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authorAndrey Smirnov <andrew.smirnov@gmail.com>2013-04-18 19:46:08 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-04-18 20:20:34 -0400
commitb879a9c2a755d4ddf9e685258de6435710fd2f03 (patch)
tree8d4bd6c9df347b7d92dfd2523cb2987e78868108 /drivers/media/radio/radio-si476x.c
parent6695be6863b75620ffa6d422965680ce785cb7c8 (diff)
[media] v4l2: Add a V4L2 driver for SI476X MFD
This commit adds a driver that exposes all the radio related functionality of the Si476x series of chips via the V4L2 subsystem. [mchehab@redhat.com: change it to depends on MFD_SI476X_CORE instead of selecting it; vidioc_s_register now uses const struct] Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/radio-si476x.c')
-rw-r--r--drivers/media/radio/radio-si476x.c1599
1 files changed, 1599 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c
new file mode 100644
index 000000000000..9430c6a29937
--- /dev/null
+++ b/drivers/media/radio/radio-si476x.c
@@ -0,0 +1,1599 @@
1/*
2 * drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips
3 *
4 * Copyright (C) 2012 Innovative Converged Devices(ICD)
5 * Copyright (C) 2013 Andrey Smirnov
6 *
7 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 */
19
20#include <linux/module.h>
21#include <linux/delay.h>
22#include <linux/interrupt.h>
23#include <linux/slab.h>
24#include <linux/atomic.h>
25#include <linux/videodev2.h>
26#include <linux/mutex.h>
27#include <linux/debugfs.h>
28#include <media/v4l2-common.h>
29#include <media/v4l2-ioctl.h>
30#include <media/v4l2-ctrls.h>
31#include <media/v4l2-event.h>
32#include <media/v4l2-device.h>
33
34#include <media/si476x.h>
35#include <linux/mfd/si476x-core.h>
36
37#define FM_FREQ_RANGE_LOW 64000000
38#define FM_FREQ_RANGE_HIGH 108000000
39
40#define AM_FREQ_RANGE_LOW 520000
41#define AM_FREQ_RANGE_HIGH 30000000
42
43#define PWRLINEFLTR (1 << 8)
44
45#define FREQ_MUL (10000000 / 625)
46
47#define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0b10000000 & (status))
48
49#define DRIVER_NAME "si476x-radio"
50#define DRIVER_CARD "SI476x AM/FM Receiver"
51
52enum si476x_freq_bands {
53 SI476X_BAND_FM,
54 SI476X_BAND_AM,
55};
56
57static const struct v4l2_frequency_band si476x_bands[] = {
58 [SI476X_BAND_FM] = {
59 .type = V4L2_TUNER_RADIO,
60 .index = SI476X_BAND_FM,
61 .capability = V4L2_TUNER_CAP_LOW
62 | V4L2_TUNER_CAP_STEREO
63 | V4L2_TUNER_CAP_RDS
64 | V4L2_TUNER_CAP_RDS_BLOCK_IO
65 | V4L2_TUNER_CAP_FREQ_BANDS,
66 .rangelow = 64 * FREQ_MUL,
67 .rangehigh = 108 * FREQ_MUL,
68 .modulation = V4L2_BAND_MODULATION_FM,
69 },
70 [SI476X_BAND_AM] = {
71 .type = V4L2_TUNER_RADIO,
72 .index = SI476X_BAND_AM,
73 .capability = V4L2_TUNER_CAP_LOW
74 | V4L2_TUNER_CAP_FREQ_BANDS,
75 .rangelow = 0.52 * FREQ_MUL,
76 .rangehigh = 30 * FREQ_MUL,
77 .modulation = V4L2_BAND_MODULATION_AM,
78 },
79};
80
81static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band)
82{
83 return freq >= si476x_bands[band].rangelow &&
84 freq <= si476x_bands[band].rangehigh;
85}
86
87static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high,
88 int band)
89{
90 return low >= si476x_bands[band].rangelow &&
91 high <= si476x_bands[band].rangehigh;
92}
93
94static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl);
95static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl);
96
97enum phase_diversity_modes_idx {
98 SI476X_IDX_PHDIV_DISABLED,
99 SI476X_IDX_PHDIV_PRIMARY_COMBINING,
100 SI476X_IDX_PHDIV_PRIMARY_ANTENNA,
101 SI476X_IDX_PHDIV_SECONDARY_ANTENNA,
102 SI476X_IDX_PHDIV_SECONDARY_COMBINING,
103};
104
105static const char * const phase_diversity_modes[] = {
106 [SI476X_IDX_PHDIV_DISABLED] = "Disabled",
107 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary",
108 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna",
109 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna",
110 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary",
111};
112
113static inline enum phase_diversity_modes_idx
114si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode)
115{
116 switch (mode) {
117 default: /* FALLTHROUGH */
118 case SI476X_PHDIV_DISABLED:
119 return SI476X_IDX_PHDIV_DISABLED;
120 case SI476X_PHDIV_PRIMARY_COMBINING:
121 return SI476X_IDX_PHDIV_PRIMARY_COMBINING;
122 case SI476X_PHDIV_PRIMARY_ANTENNA:
123 return SI476X_IDX_PHDIV_PRIMARY_ANTENNA;
124 case SI476X_PHDIV_SECONDARY_ANTENNA:
125 return SI476X_IDX_PHDIV_SECONDARY_ANTENNA;
126 case SI476X_PHDIV_SECONDARY_COMBINING:
127 return SI476X_IDX_PHDIV_SECONDARY_COMBINING;
128 }
129}
130
131static inline enum si476x_phase_diversity_mode
132si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx)
133{
134 static const int idx_to_value[] = {
135 [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED,
136 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING,
137 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA,
138 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA,
139 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING,
140 };
141
142 return idx_to_value[idx];
143}
144
145static const struct v4l2_ctrl_ops si476x_ctrl_ops = {
146 .g_volatile_ctrl = si476x_radio_g_volatile_ctrl,
147 .s_ctrl = si476x_radio_s_ctrl,
148};
149
150
151enum si476x_ctrl_idx {
152 SI476X_IDX_RSSI_THRESHOLD,
153 SI476X_IDX_SNR_THRESHOLD,
154 SI476X_IDX_MAX_TUNE_ERROR,
155 SI476X_IDX_HARMONICS_COUNT,
156 SI476X_IDX_DIVERSITY_MODE,
157 SI476X_IDX_INTERCHIP_LINK,
158};
159static struct v4l2_ctrl_config si476x_ctrls[] = {
160
161 /**
162 * SI476X during its station seeking(or tuning) process uses several
163 * parameters to detrmine if "the station" is valid:
164 *
165 * - Signal's SNR(in dBuV) must be lower than
166 * #V4L2_CID_SI476X_SNR_THRESHOLD
167 * - Signal's RSSI(in dBuV) must be greater than
168 * #V4L2_CID_SI476X_RSSI_THRESHOLD
169 * - Signal's frequency deviation(in units of 2ppm) must not be
170 * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR
171 */
172 [SI476X_IDX_RSSI_THRESHOLD] = {
173 .ops = &si476x_ctrl_ops,
174 .id = V4L2_CID_SI476X_RSSI_THRESHOLD,
175 .name = "Valid RSSI Threshold",
176 .type = V4L2_CTRL_TYPE_INTEGER,
177 .min = -128,
178 .max = 127,
179 .step = 1,
180 },
181 [SI476X_IDX_SNR_THRESHOLD] = {
182 .ops = &si476x_ctrl_ops,
183 .id = V4L2_CID_SI476X_SNR_THRESHOLD,
184 .type = V4L2_CTRL_TYPE_INTEGER,
185 .name = "Valid SNR Threshold",
186 .min = -128,
187 .max = 127,
188 .step = 1,
189 },
190 [SI476X_IDX_MAX_TUNE_ERROR] = {
191 .ops = &si476x_ctrl_ops,
192 .id = V4L2_CID_SI476X_MAX_TUNE_ERROR,
193 .type = V4L2_CTRL_TYPE_INTEGER,
194 .name = "Max Tune Errors",
195 .min = 0,
196 .max = 126 * 2,
197 .step = 2,
198 },
199
200 /**
201 * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics
202 * built-in power-line noise supression filter is to reject
203 * during AM-mode operation.
204 */
205 [SI476X_IDX_HARMONICS_COUNT] = {
206 .ops = &si476x_ctrl_ops,
207 .id = V4L2_CID_SI476X_HARMONICS_COUNT,
208 .type = V4L2_CTRL_TYPE_INTEGER,
209
210 .name = "Count of Harmonics to Reject",
211 .min = 0,
212 .max = 20,
213 .step = 1,
214 },
215
216 /**
217 * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which
218 * two tuners working in diversity mode are to work in.
219 *
220 * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled
221 * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is
222 * on, primary tuner's antenna is the main one.
223 * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is
224 * off, primary tuner's antenna is the main one.
225 * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is
226 * off, secondary tuner's antenna is the main one.
227 * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is
228 * on, secondary tuner's antenna is the main one.
229 */
230 [SI476X_IDX_DIVERSITY_MODE] = {
231 .ops = &si476x_ctrl_ops,
232 .id = V4L2_CID_SI476X_DIVERSITY_MODE,
233 .type = V4L2_CTRL_TYPE_MENU,
234 .name = "Phase Diversity Mode",
235 .qmenu = phase_diversity_modes,
236 .min = 0,
237 .max = ARRAY_SIZE(phase_diversity_modes) - 1,
238 },
239
240 /**
241 * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in
242 * diversity mode indicator. Allows user to determine if two
243 * chips working in diversity mode have established a link
244 * between each other and if the system as a whole uses
245 * signals from both antennas to receive FM radio.
246 */
247 [SI476X_IDX_INTERCHIP_LINK] = {
248 .ops = &si476x_ctrl_ops,
249 .id = V4L2_CID_SI476X_INTERCHIP_LINK,
250 .type = V4L2_CTRL_TYPE_BOOLEAN,
251 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE,
252 .name = "Inter-Chip Link",
253 .min = 0,
254 .max = 1,
255 .step = 1,
256 },
257};
258
259struct si476x_radio;
260
261/**
262 * struct si476x_radio_ops - vtable of tuner functions
263 *
264 * This table holds pointers to functions implementing particular
265 * operations depending on the mode in which the tuner chip was
266 * configured to start in. If the function is not supported
267 * corresponding element is set to #NULL.
268 *
269 * @tune_freq: Tune chip to a specific frequency
270 * @seek_start: Star station seeking
271 * @rsq_status: Get Recieved Signal Quality(RSQ) status
272 * @rds_blckcnt: Get recived RDS blocks count
273 * @phase_diversity: Change phase diversity mode of the tuner
274 * @phase_div_status: Get phase diversity mode status
275 * @acf_status: Get the status of Automatically Controlled
276 * Features(ACF)
277 * @agc_status: Get Automatic Gain Control(AGC) status
278 */
279struct si476x_radio_ops {
280 int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *);
281 int (*seek_start)(struct si476x_core *, bool, bool);
282 int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *,
283 struct si476x_rsq_status_report *);
284 int (*rds_blckcnt)(struct si476x_core *, bool,
285 struct si476x_rds_blockcount_report *);
286
287 int (*phase_diversity)(struct si476x_core *,
288 enum si476x_phase_diversity_mode);
289 int (*phase_div_status)(struct si476x_core *);
290 int (*acf_status)(struct si476x_core *,
291 struct si476x_acf_status_report *);
292 int (*agc_status)(struct si476x_core *,
293 struct si476x_agc_status_report *);
294};
295
296/**
297 * struct si476x_radio - radio device
298 *
299 * @core: Pointer to underlying core device
300 * @videodev: Pointer to video device created by V4L2 subsystem
301 * @ops: Vtable of functions. See struct si476x_radio_ops for details
302 * @kref: Reference counter
303 * @core_lock: An r/w semaphore to brebvent the deletion of underlying
304 * core structure is the radio device is being used
305 */
306struct si476x_radio {
307 struct v4l2_device v4l2dev;
308 struct video_device videodev;
309 struct v4l2_ctrl_handler ctrl_handler;
310
311 struct si476x_core *core;
312 /* This field should not be accesses unless core lock is held */
313 const struct si476x_radio_ops *ops;
314
315 struct dentry *debugfs;
316 u32 audmode;
317};
318
319static inline struct si476x_radio *
320v4l2_dev_to_radio(struct v4l2_device *d)
321{
322 return container_of(d, struct si476x_radio, v4l2dev);
323}
324
325static inline struct si476x_radio *
326v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d)
327{
328 return container_of(d, struct si476x_radio, ctrl_handler);
329}
330
331/*
332 * si476x_vidioc_querycap - query device capabilities
333 */
334static int si476x_radio_querycap(struct file *file, void *priv,
335 struct v4l2_capability *capability)
336{
337 struct si476x_radio *radio = video_drvdata(file);
338
339 strlcpy(capability->driver, radio->v4l2dev.name,
340 sizeof(capability->driver));
341 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
342 snprintf(capability->bus_info, sizeof(capability->bus_info),
343 "platform:%s", radio->v4l2dev.name);
344
345 capability->device_caps = V4L2_CAP_TUNER
346 | V4L2_CAP_RADIO
347 | V4L2_CAP_HW_FREQ_SEEK;
348
349 si476x_core_lock(radio->core);
350 if (!si476x_core_is_a_secondary_tuner(radio->core))
351 capability->device_caps |= V4L2_CAP_RDS_CAPTURE
352 | V4L2_CAP_READWRITE;
353 si476x_core_unlock(radio->core);
354
355 capability->capabilities = capability->device_caps
356 | V4L2_CAP_DEVICE_CAPS;
357 return 0;
358}
359
360static int si476x_radio_enum_freq_bands(struct file *file, void *priv,
361 struct v4l2_frequency_band *band)
362{
363 int err;
364 struct si476x_radio *radio = video_drvdata(file);
365
366 if (band->tuner != 0)
367 return -EINVAL;
368
369 switch (radio->core->chip_id) {
370 /* AM/FM tuners -- all bands are supported */
371 case SI476X_CHIP_SI4761:
372 case SI476X_CHIP_SI4764:
373 if (band->index < ARRAY_SIZE(si476x_bands)) {
374 *band = si476x_bands[band->index];
375 err = 0;
376 } else {
377 err = -EINVAL;
378 }
379 break;
380 /* FM companion tuner chips -- only FM bands are
381 * supported */
382 case SI476X_CHIP_SI4768:
383 if (band->index == SI476X_BAND_FM) {
384 *band = si476x_bands[band->index];
385 err = 0;
386 } else {
387 err = -EINVAL;
388 }
389 break;
390 default:
391 err = -EINVAL;
392 }
393
394 return err;
395}
396
397static int si476x_radio_g_tuner(struct file *file, void *priv,
398 struct v4l2_tuner *tuner)
399{
400 int err;
401 struct si476x_rsq_status_report report;
402 struct si476x_radio *radio = video_drvdata(file);
403
404 struct si476x_rsq_status_args args = {
405 .primary = false,
406 .rsqack = false,
407 .attune = false,
408 .cancel = false,
409 .stcack = false,
410 };
411
412 if (tuner->index != 0)
413 return -EINVAL;
414
415 tuner->type = V4L2_TUNER_RADIO;
416 tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies
417 * in multiples of
418 * 62.5 Hz */
419 | V4L2_TUNER_CAP_STEREO
420 | V4L2_TUNER_CAP_HWSEEK_BOUNDED
421 | V4L2_TUNER_CAP_HWSEEK_WRAP
422 | V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
423
424 si476x_core_lock(radio->core);
425
426 if (si476x_core_is_a_secondary_tuner(radio->core)) {
427 strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
428 tuner->rxsubchans = 0;
429 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
430 } else if (si476x_core_has_am(radio->core)) {
431 if (si476x_core_is_a_primary_tuner(radio->core))
432 strlcpy(tuner->name, "AM/FM (primary)",
433 sizeof(tuner->name));
434 else
435 strlcpy(tuner->name, "AM/FM", sizeof(tuner->name));
436
437 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO
438 | V4L2_TUNER_SUB_RDS;
439 tuner->capability |= V4L2_TUNER_CAP_RDS
440 | V4L2_TUNER_CAP_RDS_BLOCK_IO
441 | V4L2_TUNER_CAP_FREQ_BANDS;
442
443 tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
444 } else {
445 strlcpy(tuner->name, "FM", sizeof(tuner->name));
446 tuner->rxsubchans = V4L2_TUNER_SUB_RDS;
447 tuner->capability |= V4L2_TUNER_CAP_RDS
448 | V4L2_TUNER_CAP_RDS_BLOCK_IO
449 | V4L2_TUNER_CAP_FREQ_BANDS;
450 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
451 }
452
453 tuner->audmode = radio->audmode;
454
455 tuner->afc = 1;
456 tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
457
458 err = radio->ops->rsq_status(radio->core,
459 &args, &report);
460 if (err < 0) {
461 tuner->signal = 0;
462 } else {
463 /*
464 * tuner->signal value range: 0x0000 .. 0xFFFF,
465 * report.rssi: -128 .. 127
466 */
467 tuner->signal = (report.rssi + 128) * 257;
468 }
469 si476x_core_unlock(radio->core);
470
471 return err;
472}
473
474static int si476x_radio_s_tuner(struct file *file, void *priv,
475 const struct v4l2_tuner *tuner)
476{
477 struct si476x_radio *radio = video_drvdata(file);
478
479 if (tuner->index != 0)
480 return -EINVAL;
481
482 if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
483 tuner->audmode == V4L2_TUNER_MODE_STEREO)
484 radio->audmode = tuner->audmode;
485 else
486 radio->audmode = V4L2_TUNER_MODE_STEREO;
487
488 return 0;
489}
490
491static int si476x_radio_init_vtable(struct si476x_radio *radio,
492 enum si476x_func func)
493{
494 static const struct si476x_radio_ops fm_ops = {
495 .tune_freq = si476x_core_cmd_fm_tune_freq,
496 .seek_start = si476x_core_cmd_fm_seek_start,
497 .rsq_status = si476x_core_cmd_fm_rsq_status,
498 .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount,
499 .phase_diversity = si476x_core_cmd_fm_phase_diversity,
500 .phase_div_status = si476x_core_cmd_fm_phase_div_status,
501 .acf_status = si476x_core_cmd_fm_acf_status,
502 .agc_status = si476x_core_cmd_agc_status,
503 };
504
505 static const struct si476x_radio_ops am_ops = {
506 .tune_freq = si476x_core_cmd_am_tune_freq,
507 .seek_start = si476x_core_cmd_am_seek_start,
508 .rsq_status = si476x_core_cmd_am_rsq_status,
509 .rds_blckcnt = NULL,
510 .phase_diversity = NULL,
511 .phase_div_status = NULL,
512 .acf_status = si476x_core_cmd_am_acf_status,
513 .agc_status = NULL,
514 };
515
516 switch (func) {
517 case SI476X_FUNC_FM_RECEIVER:
518 radio->ops = &fm_ops;
519 return 0;
520
521 case SI476X_FUNC_AM_RECEIVER:
522 radio->ops = &am_ops;
523 return 0;
524 default:
525 WARN(1, "Unexpected tuner function value\n");
526 return -EINVAL;
527 }
528}
529
530static int si476x_radio_pretune(struct si476x_radio *radio,
531 enum si476x_func func)
532{
533 int retval;
534
535 struct si476x_tune_freq_args args = {
536 .zifsr = false,
537 .hd = false,
538 .injside = SI476X_INJSIDE_AUTO,
539 .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE,
540 .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO,
541 .antcap = 0,
542 };
543
544 switch (func) {
545 case SI476X_FUNC_FM_RECEIVER:
546 args.freq = v4l2_to_si476x(radio->core,
547 92 * FREQ_MUL);
548 retval = radio->ops->tune_freq(radio->core, &args);
549 break;
550 case SI476X_FUNC_AM_RECEIVER:
551 args.freq = v4l2_to_si476x(radio->core,
552 0.6 * FREQ_MUL);
553 retval = radio->ops->tune_freq(radio->core, &args);
554 break;
555 default:
556 WARN(1, "Unexpected tuner function value\n");
557 retval = -EINVAL;
558 }
559
560 return retval;
561}
562static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
563 enum si476x_func func)
564{
565 int err;
566
567 /* regcache_mark_dirty(radio->core->regmap); */
568 err = regcache_sync_region(radio->core->regmap,
569 SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
570 SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
571 if (err < 0)
572 return err;
573
574 err = regcache_sync_region(radio->core->regmap,
575 SI476X_PROP_AUDIO_DEEMPHASIS,
576 SI476X_PROP_AUDIO_PWR_LINE_FILTER);
577 if (err < 0)
578 return err;
579
580 err = regcache_sync_region(radio->core->regmap,
581 SI476X_PROP_INT_CTL_ENABLE,
582 SI476X_PROP_INT_CTL_ENABLE);
583 if (err < 0)
584 return err;
585
586 /*
587 * Is there any point in restoring SNR and the like
588 * when switching between AM/FM?
589 */
590 err = regcache_sync_region(radio->core->regmap,
591 SI476X_PROP_VALID_MAX_TUNE_ERROR,
592 SI476X_PROP_VALID_MAX_TUNE_ERROR);
593 if (err < 0)
594 return err;
595
596 err = regcache_sync_region(radio->core->regmap,
597 SI476X_PROP_VALID_SNR_THRESHOLD,
598 SI476X_PROP_VALID_RSSI_THRESHOLD);
599 if (err < 0)
600 return err;
601
602 if (func == SI476X_FUNC_FM_RECEIVER) {
603 if (si476x_core_has_diversity(radio->core)) {
604 err = si476x_core_cmd_fm_phase_diversity(radio->core,
605 radio->core->diversity_mode);
606 if (err < 0)
607 return err;
608 }
609
610 err = regcache_sync_region(radio->core->regmap,
611 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
612 SI476X_PROP_FM_RDS_CONFIG);
613 if (err < 0)
614 return err;
615 }
616
617 return si476x_radio_init_vtable(radio, func);
618
619}
620
621static int si476x_radio_change_func(struct si476x_radio *radio,
622 enum si476x_func func)
623{
624 int err;
625 bool soft;
626 /*
627 * Since power/up down is a very time consuming operation,
628 * try to avoid doing it if the requested mode matches the one
629 * the tuner is in
630 */
631 if (func == radio->core->power_up_parameters.func)
632 return 0;
633
634 soft = true;
635 err = si476x_core_stop(radio->core, soft);
636 if (err < 0) {
637 /*
638 * OK, if the chip does not want to play nice let's
639 * try to reset it in more brutal way
640 */
641 soft = false;
642 err = si476x_core_stop(radio->core, soft);
643 if (err < 0)
644 return err;
645 }
646 /*
647 Set the desired radio tuner function
648 */
649 radio->core->power_up_parameters.func = func;
650
651 err = si476x_core_start(radio->core, soft);
652 if (err < 0)
653 return err;
654
655 /*
656 * No need to do the rest of manipulations for the bootlader
657 * mode
658 */
659 if (func != SI476X_FUNC_FM_RECEIVER &&
660 func != SI476X_FUNC_AM_RECEIVER)
661 return err;
662
663 return si476x_radio_do_post_powerup_init(radio, func);
664}
665
666static int si476x_radio_g_frequency(struct file *file, void *priv,
667 struct v4l2_frequency *f)
668{
669 int err;
670 struct si476x_radio *radio = video_drvdata(file);
671
672 if (f->tuner != 0 ||
673 f->type != V4L2_TUNER_RADIO)
674 return -EINVAL;
675
676 si476x_core_lock(radio->core);
677
678 if (radio->ops->rsq_status) {
679 struct si476x_rsq_status_report report;
680 struct si476x_rsq_status_args args = {
681 .primary = false,
682 .rsqack = false,
683 .attune = true,
684 .cancel = false,
685 .stcack = false,
686 };
687
688 err = radio->ops->rsq_status(radio->core, &args, &report);
689 if (!err)
690 f->frequency = si476x_to_v4l2(radio->core,
691 report.readfreq);
692 } else {
693 err = -EINVAL;
694 }
695
696 si476x_core_unlock(radio->core);
697
698 return err;
699}
700
701static int si476x_radio_s_frequency(struct file *file, void *priv,
702 const struct v4l2_frequency *f)
703{
704 int err;
705 u32 freq = f->frequency;
706 struct si476x_tune_freq_args args;
707 struct si476x_radio *radio = video_drvdata(file);
708
709 const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
710 si476x_bands[SI476X_BAND_FM].rangelow) / 2;
711 const int band = (freq > midrange) ?
712 SI476X_BAND_FM : SI476X_BAND_AM;
713 const enum si476x_func func = (band == SI476X_BAND_AM) ?
714 SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
715
716 if (f->tuner != 0 ||
717 f->type != V4L2_TUNER_RADIO)
718 return -EINVAL;
719
720 si476x_core_lock(radio->core);
721
722 freq = clamp(freq,
723 si476x_bands[band].rangelow,
724 si476x_bands[band].rangehigh);
725
726 if (si476x_radio_freq_is_inside_of_the_band(freq,
727 SI476X_BAND_AM) &&
728 (!si476x_core_has_am(radio->core) ||
729 si476x_core_is_a_secondary_tuner(radio->core))) {
730 err = -EINVAL;
731 goto unlock;
732 }
733
734 err = si476x_radio_change_func(radio, func);
735 if (err < 0)
736 goto unlock;
737
738 args.zifsr = false;
739 args.hd = false;
740 args.injside = SI476X_INJSIDE_AUTO;
741 args.freq = v4l2_to_si476x(radio->core, freq);
742 args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE;
743 args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO;
744 args.antcap = 0;
745
746 err = radio->ops->tune_freq(radio->core, &args);
747
748unlock:
749 si476x_core_unlock(radio->core);
750 return err;
751}
752
753static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
754 const struct v4l2_hw_freq_seek *seek)
755{
756 int err;
757 enum si476x_func func;
758 u32 rangelow, rangehigh;
759 struct si476x_radio *radio = video_drvdata(file);
760
761 if (file->f_flags & O_NONBLOCK)
762 return -EAGAIN;
763
764 if (seek->tuner != 0 ||
765 seek->type != V4L2_TUNER_RADIO)
766 return -EINVAL;
767
768 si476x_core_lock(radio->core);
769
770 if (!seek->rangelow) {
771 err = regmap_read(radio->core->regmap,
772 SI476X_PROP_SEEK_BAND_BOTTOM,
773 &rangelow);
774 if (!err)
775 rangelow = si476x_to_v4l2(radio->core, rangelow);
776 else
777 goto unlock;
778 }
779 if (!seek->rangehigh) {
780 err = regmap_read(radio->core->regmap,
781 SI476X_PROP_SEEK_BAND_TOP,
782 &rangehigh);
783 if (!err)
784 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
785 else
786 goto unlock;
787 }
788
789 if (rangelow > rangehigh) {
790 err = -EINVAL;
791 goto unlock;
792 }
793
794 if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
795 SI476X_BAND_FM)) {
796 func = SI476X_FUNC_FM_RECEIVER;
797
798 } else if (si476x_core_has_am(radio->core) &&
799 si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
800 SI476X_BAND_AM)) {
801 func = SI476X_FUNC_AM_RECEIVER;
802 } else {
803 err = -EINVAL;
804 goto unlock;
805 }
806
807 err = si476x_radio_change_func(radio, func);
808 if (err < 0)
809 goto unlock;
810
811 if (seek->rangehigh) {
812 err = regmap_write(radio->core->regmap,
813 SI476X_PROP_SEEK_BAND_TOP,
814 v4l2_to_si476x(radio->core,
815 seek->rangehigh));
816 if (err)
817 goto unlock;
818 }
819 if (seek->rangelow) {
820 err = regmap_write(radio->core->regmap,
821 SI476X_PROP_SEEK_BAND_BOTTOM,
822 v4l2_to_si476x(radio->core,
823 seek->rangelow));
824 if (err)
825 goto unlock;
826 }
827 if (seek->spacing) {
828 err = regmap_write(radio->core->regmap,
829 SI476X_PROP_SEEK_FREQUENCY_SPACING,
830 v4l2_to_si476x(radio->core,
831 seek->spacing));
832 if (err)
833 goto unlock;
834 }
835
836 err = radio->ops->seek_start(radio->core,
837 seek->seek_upward,
838 seek->wrap_around);
839unlock:
840 si476x_core_unlock(radio->core);
841
842
843
844 return err;
845}
846
847static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
848{
849 int retval;
850 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
851
852 si476x_core_lock(radio->core);
853
854 switch (ctrl->id) {
855 case V4L2_CID_SI476X_INTERCHIP_LINK:
856 if (si476x_core_has_diversity(radio->core)) {
857 if (radio->ops->phase_diversity) {
858 retval = radio->ops->phase_div_status(radio->core);
859 if (retval < 0)
860 break;
861
862 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
863 retval = 0;
864 break;
865 } else {
866 retval = -ENOTTY;
867 break;
868 }
869 }
870 retval = -EINVAL;
871 break;
872 default:
873 retval = -EINVAL;
874 break;
875 }
876 si476x_core_unlock(radio->core);
877 return retval;
878
879}
880
881static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
882{
883 int retval;
884 enum si476x_phase_diversity_mode mode;
885 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
886
887 si476x_core_lock(radio->core);
888
889 switch (ctrl->id) {
890 case V4L2_CID_SI476X_HARMONICS_COUNT:
891 retval = regmap_update_bits(radio->core->regmap,
892 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
893 SI476X_PROP_PWR_HARMONICS_MASK,
894 ctrl->val);
895 break;
896 case V4L2_CID_POWER_LINE_FREQUENCY:
897 switch (ctrl->val) {
898 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
899 retval = regmap_update_bits(radio->core->regmap,
900 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
901 SI476X_PROP_PWR_ENABLE_MASK,
902 0);
903 break;
904 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
905 retval = regmap_update_bits(radio->core->regmap,
906 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
907 SI476X_PROP_PWR_GRID_MASK,
908 SI476X_PROP_PWR_GRID_50HZ);
909 break;
910 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
911 retval = regmap_update_bits(radio->core->regmap,
912 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
913 SI476X_PROP_PWR_GRID_MASK,
914 SI476X_PROP_PWR_GRID_60HZ);
915 break;
916 default:
917 retval = -EINVAL;
918 break;
919 }
920 break;
921 case V4L2_CID_SI476X_RSSI_THRESHOLD:
922 retval = regmap_write(radio->core->regmap,
923 SI476X_PROP_VALID_RSSI_THRESHOLD,
924 ctrl->val);
925 break;
926 case V4L2_CID_SI476X_SNR_THRESHOLD:
927 retval = regmap_write(radio->core->regmap,
928 SI476X_PROP_VALID_SNR_THRESHOLD,
929 ctrl->val);
930 break;
931 case V4L2_CID_SI476X_MAX_TUNE_ERROR:
932 retval = regmap_write(radio->core->regmap,
933 SI476X_PROP_VALID_MAX_TUNE_ERROR,
934 ctrl->val);
935 break;
936 case V4L2_CID_RDS_RECEPTION:
937 /*
938 * It looks like RDS related properties are
939 * inaccesable when tuner is in AM mode, so cache the
940 * changes
941 */
942 if (si476x_core_is_in_am_receiver_mode(radio->core))
943 regcache_cache_only(radio->core->regmap, true);
944
945 if (ctrl->val) {
946 retval = regmap_write(radio->core->regmap,
947 SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
948 radio->core->rds_fifo_depth);
949 if (retval < 0)
950 break;
951
952 if (radio->core->client->irq) {
953 retval = regmap_write(radio->core->regmap,
954 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
955 SI476X_RDSRECV);
956 if (retval < 0)
957 break;
958 }
959
960 /* Drain RDS FIFO before enabling RDS processing */
961 retval = si476x_core_cmd_fm_rds_status(radio->core,
962 false,
963 true,
964 true,
965 NULL);
966 if (retval < 0)
967 break;
968
969 retval = regmap_update_bits(radio->core->regmap,
970 SI476X_PROP_FM_RDS_CONFIG,
971 SI476X_PROP_RDSEN_MASK,
972 SI476X_PROP_RDSEN);
973 } else {
974 retval = regmap_update_bits(radio->core->regmap,
975 SI476X_PROP_FM_RDS_CONFIG,
976 SI476X_PROP_RDSEN_MASK,
977 !SI476X_PROP_RDSEN);
978 }
979
980 if (si476x_core_is_in_am_receiver_mode(radio->core))
981 regcache_cache_only(radio->core->regmap, false);
982 break;
983 case V4L2_CID_TUNE_DEEMPHASIS:
984 retval = regmap_write(radio->core->regmap,
985 SI476X_PROP_AUDIO_DEEMPHASIS,
986 ctrl->val);
987 break;
988
989 case V4L2_CID_SI476X_DIVERSITY_MODE:
990 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
991
992 if (mode == radio->core->diversity_mode) {
993 retval = 0;
994 break;
995 }
996
997 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
998 /*
999 * Diversity cannot be configured while tuner
1000 * is in AM mode so save the changes and carry on.
1001 */
1002 radio->core->diversity_mode = mode;
1003 retval = 0;
1004 } else {
1005 retval = radio->ops->phase_diversity(radio->core, mode);
1006 if (!retval)
1007 radio->core->diversity_mode = mode;
1008 }
1009 break;
1010
1011 default:
1012 retval = -EINVAL;
1013 break;
1014 }
1015
1016 si476x_core_unlock(radio->core);
1017
1018 return retval;
1019}
1020
1021static int si476x_radio_g_chip_ident(struct file *file, void *fh,
1022 struct v4l2_dbg_chip_ident *chip)
1023{
1024 if (chip->match.type == V4L2_CHIP_MATCH_HOST &&
1025 v4l2_chip_match_host(&chip->match))
1026 return 0;
1027 return -EINVAL;
1028}
1029
1030
1031#ifdef CONFIG_VIDEO_ADV_DEBUG
1032static int si476x_radio_g_register(struct file *file, void *fh,
1033 struct v4l2_dbg_register *reg)
1034{
1035 int err;
1036 unsigned int value;
1037 struct si476x_radio *radio = video_drvdata(file);
1038
1039 si476x_core_lock(radio->core);
1040 reg->size = 2;
1041 err = regmap_read(radio->core->regmap,
1042 (unsigned int)reg->reg, &value);
1043 reg->val = value;
1044 si476x_core_unlock(radio->core);
1045
1046 return err;
1047}
1048static int si476x_radio_s_register(struct file *file, void *fh,
1049 const struct v4l2_dbg_register *reg)
1050{
1051
1052 int err;
1053 struct si476x_radio *radio = video_drvdata(file);
1054
1055 si476x_core_lock(radio->core);
1056 err = regmap_write(radio->core->regmap,
1057 (unsigned int)reg->reg,
1058 (unsigned int)reg->val);
1059 si476x_core_unlock(radio->core);
1060
1061 return err;
1062}
1063#endif
1064
1065static int si476x_radio_fops_open(struct file *file)
1066{
1067 struct si476x_radio *radio = video_drvdata(file);
1068 int err;
1069
1070 err = v4l2_fh_open(file);
1071 if (err)
1072 return err;
1073
1074 if (v4l2_fh_is_singular_file(file)) {
1075 si476x_core_lock(radio->core);
1076 err = si476x_core_set_power_state(radio->core,
1077 SI476X_POWER_UP_FULL);
1078 if (err < 0)
1079 goto done;
1080
1081 err = si476x_radio_do_post_powerup_init(radio,
1082 radio->core->power_up_parameters.func);
1083 if (err < 0)
1084 goto power_down;
1085
1086 err = si476x_radio_pretune(radio,
1087 radio->core->power_up_parameters.func);
1088 if (err < 0)
1089 goto power_down;
1090
1091 si476x_core_unlock(radio->core);
1092 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1093 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1094 }
1095
1096 return err;
1097
1098power_down:
1099 si476x_core_set_power_state(radio->core,
1100 SI476X_POWER_DOWN);
1101done:
1102 si476x_core_unlock(radio->core);
1103 v4l2_fh_release(file);
1104
1105 return err;
1106}
1107
1108static int si476x_radio_fops_release(struct file *file)
1109{
1110 int err;
1111 struct si476x_radio *radio = video_drvdata(file);
1112
1113 if (v4l2_fh_is_singular_file(file) &&
1114 atomic_read(&radio->core->is_alive))
1115 si476x_core_set_power_state(radio->core,
1116 SI476X_POWER_DOWN);
1117
1118 err = v4l2_fh_release(file);
1119
1120 return err;
1121}
1122
1123static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1124 size_t count, loff_t *ppos)
1125{
1126 ssize_t rval;
1127 size_t fifo_len;
1128 unsigned int copied;
1129
1130 struct si476x_radio *radio = video_drvdata(file);
1131
1132 /* block if no new data available */
1133 if (kfifo_is_empty(&radio->core->rds_fifo)) {
1134 if (file->f_flags & O_NONBLOCK)
1135 return -EWOULDBLOCK;
1136
1137 rval = wait_event_interruptible(radio->core->rds_read_queue,
1138 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1139 !atomic_read(&radio->core->is_alive)));
1140 if (rval < 0)
1141 return -EINTR;
1142
1143 if (!atomic_read(&radio->core->is_alive))
1144 return -ENODEV;
1145 }
1146
1147 fifo_len = kfifo_len(&radio->core->rds_fifo);
1148
1149 if (kfifo_to_user(&radio->core->rds_fifo, buf,
1150 min(fifo_len, count),
1151 &copied) != 0) {
1152 dev_warn(&radio->videodev.dev,
1153 "Error during FIFO to userspace copy\n");
1154 rval = -EIO;
1155 } else {
1156 rval = (ssize_t)copied;
1157 }
1158
1159 return rval;
1160}
1161
1162static unsigned int si476x_radio_fops_poll(struct file *file,
1163 struct poll_table_struct *pts)
1164{
1165 struct si476x_radio *radio = video_drvdata(file);
1166 unsigned long req_events = poll_requested_events(pts);
1167 unsigned int err = v4l2_ctrl_poll(file, pts);
1168
1169 if (req_events & (POLLIN | POLLRDNORM)) {
1170 if (atomic_read(&radio->core->is_alive))
1171 poll_wait(file, &radio->core->rds_read_queue, pts);
1172
1173 if (!atomic_read(&radio->core->is_alive))
1174 err = POLLHUP;
1175
1176 if (!kfifo_is_empty(&radio->core->rds_fifo))
1177 err = POLLIN | POLLRDNORM;
1178 }
1179
1180 return err;
1181}
1182
1183static const struct v4l2_file_operations si476x_fops = {
1184 .owner = THIS_MODULE,
1185 .read = si476x_radio_fops_read,
1186 .poll = si476x_radio_fops_poll,
1187 .unlocked_ioctl = video_ioctl2,
1188 .open = si476x_radio_fops_open,
1189 .release = si476x_radio_fops_release,
1190};
1191
1192
1193static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1194 .vidioc_querycap = si476x_radio_querycap,
1195 .vidioc_g_tuner = si476x_radio_g_tuner,
1196 .vidioc_s_tuner = si476x_radio_s_tuner,
1197
1198 .vidioc_g_frequency = si476x_radio_g_frequency,
1199 .vidioc_s_frequency = si476x_radio_s_frequency,
1200 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek,
1201 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands,
1202
1203 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1204 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1205
1206 .vidioc_g_chip_ident = si476x_radio_g_chip_ident,
1207#ifdef CONFIG_VIDEO_ADV_DEBUG
1208 .vidioc_g_register = si476x_radio_g_register,
1209 .vidioc_s_register = si476x_radio_s_register,
1210#endif
1211};
1212
1213
1214static const struct video_device si476x_viddev_template = {
1215 .fops = &si476x_fops,
1216 .name = DRIVER_NAME,
1217 .release = video_device_release_empty,
1218};
1219
1220
1221
1222static ssize_t si476x_radio_read_acf_blob(struct file *file,
1223 char __user *user_buf,
1224 size_t count, loff_t *ppos)
1225{
1226 int err;
1227 struct si476x_radio *radio = file->private_data;
1228 struct si476x_acf_status_report report;
1229
1230 si476x_core_lock(radio->core);
1231 if (radio->ops->acf_status)
1232 err = radio->ops->acf_status(radio->core, &report);
1233 else
1234 err = -ENOENT;
1235 si476x_core_unlock(radio->core);
1236
1237 if (err < 0)
1238 return err;
1239
1240 return simple_read_from_buffer(user_buf, count, ppos, &report,
1241 sizeof(report));
1242}
1243
1244static const struct file_operations radio_acf_fops = {
1245 .open = simple_open,
1246 .llseek = default_llseek,
1247 .read = si476x_radio_read_acf_blob,
1248};
1249
1250static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1251 char __user *user_buf,
1252 size_t count, loff_t *ppos)
1253{
1254 int err;
1255 struct si476x_radio *radio = file->private_data;
1256 struct si476x_rds_blockcount_report report;
1257
1258 si476x_core_lock(radio->core);
1259 if (radio->ops->rds_blckcnt)
1260 err = radio->ops->rds_blckcnt(radio->core, true,
1261 &report);
1262 else
1263 err = -ENOENT;
1264 si476x_core_unlock(radio->core);
1265
1266 if (err < 0)
1267 return err;
1268
1269 return simple_read_from_buffer(user_buf, count, ppos, &report,
1270 sizeof(report));
1271}
1272
1273static const struct file_operations radio_rds_blckcnt_fops = {
1274 .open = simple_open,
1275 .llseek = default_llseek,
1276 .read = si476x_radio_read_rds_blckcnt_blob,
1277};
1278
1279static ssize_t si476x_radio_read_agc_blob(struct file *file,
1280 char __user *user_buf,
1281 size_t count, loff_t *ppos)
1282{
1283 int err;
1284 struct si476x_radio *radio = file->private_data;
1285 struct si476x_agc_status_report report;
1286
1287 si476x_core_lock(radio->core);
1288 if (radio->ops->rds_blckcnt)
1289 err = radio->ops->agc_status(radio->core, &report);
1290 else
1291 err = -ENOENT;
1292 si476x_core_unlock(radio->core);
1293
1294 if (err < 0)
1295 return err;
1296
1297 return simple_read_from_buffer(user_buf, count, ppos, &report,
1298 sizeof(report));
1299}
1300
1301static const struct file_operations radio_agc_fops = {
1302 .open = simple_open,
1303 .llseek = default_llseek,
1304 .read = si476x_radio_read_agc_blob,
1305};
1306
1307static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1308 char __user *user_buf,
1309 size_t count, loff_t *ppos)
1310{
1311 int err;
1312 struct si476x_radio *radio = file->private_data;
1313 struct si476x_rsq_status_report report;
1314 struct si476x_rsq_status_args args = {
1315 .primary = false,
1316 .rsqack = false,
1317 .attune = false,
1318 .cancel = false,
1319 .stcack = false,
1320 };
1321
1322 si476x_core_lock(radio->core);
1323 if (radio->ops->rds_blckcnt)
1324 err = radio->ops->rsq_status(radio->core, &args, &report);
1325 else
1326 err = -ENOENT;
1327 si476x_core_unlock(radio->core);
1328
1329 if (err < 0)
1330 return err;
1331
1332 return simple_read_from_buffer(user_buf, count, ppos, &report,
1333 sizeof(report));
1334}
1335
1336static const struct file_operations radio_rsq_fops = {
1337 .open = simple_open,
1338 .llseek = default_llseek,
1339 .read = si476x_radio_read_rsq_blob,
1340};
1341
1342static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1343 char __user *user_buf,
1344 size_t count, loff_t *ppos)
1345{
1346 int err;
1347 struct si476x_radio *radio = file->private_data;
1348 struct si476x_rsq_status_report report;
1349 struct si476x_rsq_status_args args = {
1350 .primary = true,
1351 .rsqack = false,
1352 .attune = false,
1353 .cancel = false,
1354 .stcack = false,
1355 };
1356
1357 si476x_core_lock(radio->core);
1358 if (radio->ops->rds_blckcnt)
1359 err = radio->ops->rsq_status(radio->core, &args, &report);
1360 else
1361 err = -ENOENT;
1362 si476x_core_unlock(radio->core);
1363
1364 if (err < 0)
1365 return err;
1366
1367 return simple_read_from_buffer(user_buf, count, ppos, &report,
1368 sizeof(report));
1369}
1370
1371static const struct file_operations radio_rsq_primary_fops = {
1372 .open = simple_open,
1373 .llseek = default_llseek,
1374 .read = si476x_radio_read_rsq_primary_blob,
1375};
1376
1377
1378static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1379{
1380 struct dentry *dentry;
1381 int ret;
1382
1383 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1384 if (IS_ERR(dentry)) {
1385 ret = PTR_ERR(dentry);
1386 goto exit;
1387 }
1388 radio->debugfs = dentry;
1389
1390 dentry = debugfs_create_file("acf", S_IRUGO,
1391 radio->debugfs, radio, &radio_acf_fops);
1392 if (IS_ERR(dentry)) {
1393 ret = PTR_ERR(dentry);
1394 goto cleanup;
1395 }
1396
1397 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1398 radio->debugfs, radio,
1399 &radio_rds_blckcnt_fops);
1400 if (IS_ERR(dentry)) {
1401 ret = PTR_ERR(dentry);
1402 goto cleanup;
1403 }
1404
1405 dentry = debugfs_create_file("agc", S_IRUGO,
1406 radio->debugfs, radio, &radio_agc_fops);
1407 if (IS_ERR(dentry)) {
1408 ret = PTR_ERR(dentry);
1409 goto cleanup;
1410 }
1411
1412 dentry = debugfs_create_file("rsq", S_IRUGO,
1413 radio->debugfs, radio, &radio_rsq_fops);
1414 if (IS_ERR(dentry)) {
1415 ret = PTR_ERR(dentry);
1416 goto cleanup;
1417 }
1418
1419 dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1420 radio->debugfs, radio,
1421 &radio_rsq_primary_fops);
1422 if (IS_ERR(dentry)) {
1423 ret = PTR_ERR(dentry);
1424 goto cleanup;
1425 }
1426
1427 return 0;
1428cleanup:
1429 debugfs_remove_recursive(radio->debugfs);
1430exit:
1431 return ret;
1432}
1433
1434
1435static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1436 enum si476x_ctrl_idx idx)
1437{
1438 int rval;
1439 struct v4l2_ctrl *ctrl;
1440
1441 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1442 &si476x_ctrls[idx],
1443 NULL);
1444 rval = radio->ctrl_handler.error;
1445 if (ctrl == NULL && rval)
1446 dev_err(radio->v4l2dev.dev,
1447 "Could not initialize '%s' control %d\n",
1448 si476x_ctrls[idx].name, rval);
1449
1450 return rval;
1451}
1452
1453static int si476x_radio_probe(struct platform_device *pdev)
1454{
1455 int rval;
1456 struct si476x_radio *radio;
1457 struct v4l2_ctrl *ctrl;
1458
1459 static atomic_t instance = ATOMIC_INIT(0);
1460
1461 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1462 if (!radio)
1463 return -ENOMEM;
1464
1465 radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1466
1467 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1468
1469 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1470 if (rval) {
1471 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1472 return rval;
1473 }
1474
1475 memcpy(&radio->videodev, &si476x_viddev_template,
1476 sizeof(struct video_device));
1477
1478 radio->videodev.v4l2_dev = &radio->v4l2dev;
1479 radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1480
1481 video_set_drvdata(&radio->videodev, radio);
1482 platform_set_drvdata(pdev, radio);
1483
1484 set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags);
1485
1486 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1487 v4l2_ctrl_handler_init(&radio->ctrl_handler,
1488 1 + ARRAY_SIZE(si476x_ctrls));
1489
1490 if (si476x_core_has_am(radio->core)) {
1491 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1492 &si476x_ctrl_ops,
1493 V4L2_CID_POWER_LINE_FREQUENCY,
1494 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1495 0, 0);
1496 rval = radio->ctrl_handler.error;
1497 if (ctrl == NULL && rval) {
1498 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1499 rval);
1500 goto exit;
1501 }
1502
1503 rval = si476x_radio_add_new_custom(radio,
1504 SI476X_IDX_HARMONICS_COUNT);
1505 if (rval < 0)
1506 goto exit;
1507 }
1508
1509 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1510 if (rval < 0)
1511 goto exit;
1512
1513 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1514 if (rval < 0)
1515 goto exit;
1516
1517 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1518 if (rval < 0)
1519 goto exit;
1520
1521 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1522 &si476x_ctrl_ops,
1523 V4L2_CID_TUNE_DEEMPHASIS,
1524 V4L2_DEEMPHASIS_75_uS, 0, 0);
1525 rval = radio->ctrl_handler.error;
1526 if (ctrl == NULL && rval) {
1527 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1528 rval);
1529 goto exit;
1530 }
1531
1532 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1533 V4L2_CID_RDS_RECEPTION,
1534 0, 1, 1, 1);
1535 rval = radio->ctrl_handler.error;
1536 if (ctrl == NULL && rval) {
1537 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1538 rval);
1539 goto exit;
1540 }
1541
1542 if (si476x_core_has_diversity(radio->core)) {
1543 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1544 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1545 si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1546 if (rval < 0)
1547 goto exit;
1548
1549 si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1550 if (rval < 0)
1551 goto exit;
1552 }
1553
1554 /* register video device */
1555 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1556 if (rval < 0) {
1557 dev_err(&pdev->dev, "Could not register video device\n");
1558 goto exit;
1559 }
1560
1561 rval = si476x_radio_init_debugfs(radio);
1562 if (rval < 0) {
1563 dev_err(&pdev->dev, "Could not creat debugfs interface\n");
1564 goto exit;
1565 }
1566
1567 return 0;
1568exit:
1569 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1570 return rval;
1571}
1572
1573static int si476x_radio_remove(struct platform_device *pdev)
1574{
1575 struct si476x_radio *radio = platform_get_drvdata(pdev);
1576
1577 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1578 video_unregister_device(&radio->videodev);
1579 v4l2_device_unregister(&radio->v4l2dev);
1580 debugfs_remove_recursive(radio->debugfs);
1581
1582 return 0;
1583}
1584
1585MODULE_ALIAS("platform:si476x-radio");
1586
1587static struct platform_driver si476x_radio_driver = {
1588 .driver = {
1589 .name = DRIVER_NAME,
1590 .owner = THIS_MODULE,
1591 },
1592 .probe = si476x_radio_probe,
1593 .remove = si476x_radio_remove,
1594};
1595module_platform_driver(si476x_radio_driver);
1596
1597MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1598MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1599MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 21:34:00 -0500