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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / radio / radio-si476x.c
blob271f725b17e85c77017f08ac9181510369f16872
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/drv-intf/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) (0x80 & (status))
48
49 #define DRIVER_NAME "si476x-radio"
50 #define DRIVER_CARD "SI476x AM/FM Receiver"
51
52 enum si476x_freq_bands {
53 SI476X_BAND_FM,
54 SI476X_BAND_AM,
55 };
56
57 static 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
81 static 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
87 static 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
94 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl);
95 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl);
96
97 enum 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
105 static 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
113 static inline enum phase_diversity_modes_idx
114 si476x_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
131 static inline enum si476x_phase_diversity_mode
132 si476x_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
145 static 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
151 enum 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 };
159 static 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
259 struct 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 Received Signal Quality(RSQ) status
272 * @rds_blckcnt: Get received 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 */
279 struct 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 */
306 struct 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
319 static inline struct si476x_radio *
320 v4l2_dev_to_radio(struct v4l2_device *d)
321 {
322 return container_of(d, struct si476x_radio, v4l2dev);
323 }
324
325 static inline struct si476x_radio *
326 v4l2_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 */
334 static 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
360 static 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
397 static 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
474 static 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
491 static 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
530 static 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 }
562 static 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
621 static 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
666 static 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
701 static 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
748 unlock:
749 si476x_core_unlock(radio->core);
750 return err;
751 }
752
753 static 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);
839 unlock:
840 si476x_core_unlock(radio->core);
841
842
843
844 return err;
845 }
846
847 static 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
881 static 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
1021 #ifdef CONFIG_VIDEO_ADV_DEBUG
1022 static int si476x_radio_g_register(struct file *file, void *fh,
1023 struct v4l2_dbg_register *reg)
1024 {
1025 int err;
1026 unsigned int value;
1027 struct si476x_radio *radio = video_drvdata(file);
1028
1029 si476x_core_lock(radio->core);
1030 reg->size = 2;
1031 err = regmap_read(radio->core->regmap,
1032 (unsigned int)reg->reg, &value);
1033 reg->val = value;
1034 si476x_core_unlock(radio->core);
1035
1036 return err;
1037 }
1038 static int si476x_radio_s_register(struct file *file, void *fh,
1039 const struct v4l2_dbg_register *reg)
1040 {
1041
1042 int err;
1043 struct si476x_radio *radio = video_drvdata(file);
1044
1045 si476x_core_lock(radio->core);
1046 err = regmap_write(radio->core->regmap,
1047 (unsigned int)reg->reg,
1048 (unsigned int)reg->val);
1049 si476x_core_unlock(radio->core);
1050
1051 return err;
1052 }
1053 #endif
1054
1055 static int si476x_radio_fops_open(struct file *file)
1056 {
1057 struct si476x_radio *radio = video_drvdata(file);
1058 int err;
1059
1060 err = v4l2_fh_open(file);
1061 if (err)
1062 return err;
1063
1064 if (v4l2_fh_is_singular_file(file)) {
1065 si476x_core_lock(radio->core);
1066 err = si476x_core_set_power_state(radio->core,
1067 SI476X_POWER_UP_FULL);
1068 if (err < 0)
1069 goto done;
1070
1071 err = si476x_radio_do_post_powerup_init(radio,
1072 radio->core->power_up_parameters.func);
1073 if (err < 0)
1074 goto power_down;
1075
1076 err = si476x_radio_pretune(radio,
1077 radio->core->power_up_parameters.func);
1078 if (err < 0)
1079 goto power_down;
1080
1081 si476x_core_unlock(radio->core);
1082 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1083 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1084 }
1085
1086 return err;
1087
1088 power_down:
1089 si476x_core_set_power_state(radio->core,
1090 SI476X_POWER_DOWN);
1091 done:
1092 si476x_core_unlock(radio->core);
1093 v4l2_fh_release(file);
1094
1095 return err;
1096 }
1097
1098 static int si476x_radio_fops_release(struct file *file)
1099 {
1100 int err;
1101 struct si476x_radio *radio = video_drvdata(file);
1102
1103 if (v4l2_fh_is_singular_file(file) &&
1104 atomic_read(&radio->core->is_alive))
1105 si476x_core_set_power_state(radio->core,
1106 SI476X_POWER_DOWN);
1107
1108 err = v4l2_fh_release(file);
1109
1110 return err;
1111 }
1112
1113 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1114 size_t count, loff_t *ppos)
1115 {
1116 ssize_t rval;
1117 size_t fifo_len;
1118 unsigned int copied;
1119
1120 struct si476x_radio *radio = video_drvdata(file);
1121
1122 /* block if no new data available */
1123 if (kfifo_is_empty(&radio->core->rds_fifo)) {
1124 if (file->f_flags & O_NONBLOCK)
1125 return -EWOULDBLOCK;
1126
1127 rval = wait_event_interruptible(radio->core->rds_read_queue,
1128 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1129 !atomic_read(&radio->core->is_alive)));
1130 if (rval < 0)
1131 return -EINTR;
1132
1133 if (!atomic_read(&radio->core->is_alive))
1134 return -ENODEV;
1135 }
1136
1137 fifo_len = kfifo_len(&radio->core->rds_fifo);
1138
1139 if (kfifo_to_user(&radio->core->rds_fifo, buf,
1140 min(fifo_len, count),
1141 &copied) != 0) {
1142 dev_warn(&radio->videodev.dev,
1143 "Error during FIFO to userspace copy\n");
1144 rval = -EIO;
1145 } else {
1146 rval = (ssize_t)copied;
1147 }
1148
1149 return rval;
1150 }
1151
1152 static unsigned int si476x_radio_fops_poll(struct file *file,
1153 struct poll_table_struct *pts)
1154 {
1155 struct si476x_radio *radio = video_drvdata(file);
1156 unsigned long req_events = poll_requested_events(pts);
1157 unsigned int err = v4l2_ctrl_poll(file, pts);
1158
1159 if (req_events & (POLLIN | POLLRDNORM)) {
1160 if (atomic_read(&radio->core->is_alive))
1161 poll_wait(file, &radio->core->rds_read_queue, pts);
1162
1163 if (!atomic_read(&radio->core->is_alive))
1164 err = POLLHUP;
1165
1166 if (!kfifo_is_empty(&radio->core->rds_fifo))
1167 err = POLLIN | POLLRDNORM;
1168 }
1169
1170 return err;
1171 }
1172
1173 static const struct v4l2_file_operations si476x_fops = {
1174 .owner = THIS_MODULE,
1175 .read = si476x_radio_fops_read,
1176 .poll = si476x_radio_fops_poll,
1177 .unlocked_ioctl = video_ioctl2,
1178 .open = si476x_radio_fops_open,
1179 .release = si476x_radio_fops_release,
1180 };
1181
1182
1183 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1184 .vidioc_querycap = si476x_radio_querycap,
1185 .vidioc_g_tuner = si476x_radio_g_tuner,
1186 .vidioc_s_tuner = si476x_radio_s_tuner,
1187
1188 .vidioc_g_frequency = si476x_radio_g_frequency,
1189 .vidioc_s_frequency = si476x_radio_s_frequency,
1190 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek,
1191 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands,
1192
1193 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1194 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1195
1196 #ifdef CONFIG_VIDEO_ADV_DEBUG
1197 .vidioc_g_register = si476x_radio_g_register,
1198 .vidioc_s_register = si476x_radio_s_register,
1199 #endif
1200 };
1201
1202
1203 static const struct video_device si476x_viddev_template = {
1204 .fops = &si476x_fops,
1205 .name = DRIVER_NAME,
1206 .release = video_device_release_empty,
1207 };
1208
1209
1210
1211 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1212 char __user *user_buf,
1213 size_t count, loff_t *ppos)
1214 {
1215 int err;
1216 struct si476x_radio *radio = file->private_data;
1217 struct si476x_acf_status_report report;
1218
1219 si476x_core_lock(radio->core);
1220 if (radio->ops->acf_status)
1221 err = radio->ops->acf_status(radio->core, &report);
1222 else
1223 err = -ENOENT;
1224 si476x_core_unlock(radio->core);
1225
1226 if (err < 0)
1227 return err;
1228
1229 return simple_read_from_buffer(user_buf, count, ppos, &report,
1230 sizeof(report));
1231 }
1232
1233 static const struct file_operations radio_acf_fops = {
1234 .open = simple_open,
1235 .llseek = default_llseek,
1236 .read = si476x_radio_read_acf_blob,
1237 };
1238
1239 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1240 char __user *user_buf,
1241 size_t count, loff_t *ppos)
1242 {
1243 int err;
1244 struct si476x_radio *radio = file->private_data;
1245 struct si476x_rds_blockcount_report report;
1246
1247 si476x_core_lock(radio->core);
1248 if (radio->ops->rds_blckcnt)
1249 err = radio->ops->rds_blckcnt(radio->core, true,
1250 &report);
1251 else
1252 err = -ENOENT;
1253 si476x_core_unlock(radio->core);
1254
1255 if (err < 0)
1256 return err;
1257
1258 return simple_read_from_buffer(user_buf, count, ppos, &report,
1259 sizeof(report));
1260 }
1261
1262 static const struct file_operations radio_rds_blckcnt_fops = {
1263 .open = simple_open,
1264 .llseek = default_llseek,
1265 .read = si476x_radio_read_rds_blckcnt_blob,
1266 };
1267
1268 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1269 char __user *user_buf,
1270 size_t count, loff_t *ppos)
1271 {
1272 int err;
1273 struct si476x_radio *radio = file->private_data;
1274 struct si476x_agc_status_report report;
1275
1276 si476x_core_lock(radio->core);
1277 if (radio->ops->rds_blckcnt)
1278 err = radio->ops->agc_status(radio->core, &report);
1279 else
1280 err = -ENOENT;
1281 si476x_core_unlock(radio->core);
1282
1283 if (err < 0)
1284 return err;
1285
1286 return simple_read_from_buffer(user_buf, count, ppos, &report,
1287 sizeof(report));
1288 }
1289
1290 static const struct file_operations radio_agc_fops = {
1291 .open = simple_open,
1292 .llseek = default_llseek,
1293 .read = si476x_radio_read_agc_blob,
1294 };
1295
1296 static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1297 char __user *user_buf,
1298 size_t count, loff_t *ppos)
1299 {
1300 int err;
1301 struct si476x_radio *radio = file->private_data;
1302 struct si476x_rsq_status_report report;
1303 struct si476x_rsq_status_args args = {
1304 .primary = false,
1305 .rsqack = false,
1306 .attune = false,
1307 .cancel = false,
1308 .stcack = false,
1309 };
1310
1311 si476x_core_lock(radio->core);
1312 if (radio->ops->rds_blckcnt)
1313 err = radio->ops->rsq_status(radio->core, &args, &report);
1314 else
1315 err = -ENOENT;
1316 si476x_core_unlock(radio->core);
1317
1318 if (err < 0)
1319 return err;
1320
1321 return simple_read_from_buffer(user_buf, count, ppos, &report,
1322 sizeof(report));
1323 }
1324
1325 static const struct file_operations radio_rsq_fops = {
1326 .open = simple_open,
1327 .llseek = default_llseek,
1328 .read = si476x_radio_read_rsq_blob,
1329 };
1330
1331 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1332 char __user *user_buf,
1333 size_t count, loff_t *ppos)
1334 {
1335 int err;
1336 struct si476x_radio *radio = file->private_data;
1337 struct si476x_rsq_status_report report;
1338 struct si476x_rsq_status_args args = {
1339 .primary = true,
1340 .rsqack = false,
1341 .attune = false,
1342 .cancel = false,
1343 .stcack = false,
1344 };
1345
1346 si476x_core_lock(radio->core);
1347 if (radio->ops->rds_blckcnt)
1348 err = radio->ops->rsq_status(radio->core, &args, &report);
1349 else
1350 err = -ENOENT;
1351 si476x_core_unlock(radio->core);
1352
1353 if (err < 0)
1354 return err;
1355
1356 return simple_read_from_buffer(user_buf, count, ppos, &report,
1357 sizeof(report));
1358 }
1359
1360 static const struct file_operations radio_rsq_primary_fops = {
1361 .open = simple_open,
1362 .llseek = default_llseek,
1363 .read = si476x_radio_read_rsq_primary_blob,
1364 };
1365
1366
1367 static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1368 {
1369 struct dentry *dentry;
1370 int ret;
1371
1372 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1373 if (IS_ERR(dentry)) {
1374 ret = PTR_ERR(dentry);
1375 goto exit;
1376 }
1377 radio->debugfs = dentry;
1378
1379 dentry = debugfs_create_file("acf", S_IRUGO,
1380 radio->debugfs, radio, &radio_acf_fops);
1381 if (IS_ERR(dentry)) {
1382 ret = PTR_ERR(dentry);
1383 goto cleanup;
1384 }
1385
1386 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1387 radio->debugfs, radio,
1388 &radio_rds_blckcnt_fops);
1389 if (IS_ERR(dentry)) {
1390 ret = PTR_ERR(dentry);
1391 goto cleanup;
1392 }
1393
1394 dentry = debugfs_create_file("agc", S_IRUGO,
1395 radio->debugfs, radio, &radio_agc_fops);
1396 if (IS_ERR(dentry)) {
1397 ret = PTR_ERR(dentry);
1398 goto cleanup;
1399 }
1400
1401 dentry = debugfs_create_file("rsq", S_IRUGO,
1402 radio->debugfs, radio, &radio_rsq_fops);
1403 if (IS_ERR(dentry)) {
1404 ret = PTR_ERR(dentry);
1405 goto cleanup;
1406 }
1407
1408 dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1409 radio->debugfs, radio,
1410 &radio_rsq_primary_fops);
1411 if (IS_ERR(dentry)) {
1412 ret = PTR_ERR(dentry);
1413 goto cleanup;
1414 }
1415
1416 return 0;
1417 cleanup:
1418 debugfs_remove_recursive(radio->debugfs);
1419 exit:
1420 return ret;
1421 }
1422
1423
1424 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1425 enum si476x_ctrl_idx idx)
1426 {
1427 int rval;
1428 struct v4l2_ctrl *ctrl;
1429
1430 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1431 &si476x_ctrls[idx],
1432 NULL);
1433 rval = radio->ctrl_handler.error;
1434 if (ctrl == NULL && rval)
1435 dev_err(radio->v4l2dev.dev,
1436 "Could not initialize '%s' control %d\n",
1437 si476x_ctrls[idx].name, rval);
1438
1439 return rval;
1440 }
1441
1442 static int si476x_radio_probe(struct platform_device *pdev)
1443 {
1444 int rval;
1445 struct si476x_radio *radio;
1446 struct v4l2_ctrl *ctrl;
1447
1448 static atomic_t instance = ATOMIC_INIT(0);
1449
1450 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1451 if (!radio)
1452 return -ENOMEM;
1453
1454 radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1455
1456 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1457
1458 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1459 if (rval) {
1460 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1461 return rval;
1462 }
1463
1464 memcpy(&radio->videodev, &si476x_viddev_template,
1465 sizeof(struct video_device));
1466
1467 radio->videodev.v4l2_dev = &radio->v4l2dev;
1468 radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1469
1470 video_set_drvdata(&radio->videodev, radio);
1471 platform_set_drvdata(pdev, radio);
1472
1473
1474 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1475 v4l2_ctrl_handler_init(&radio->ctrl_handler,
1476 1 + ARRAY_SIZE(si476x_ctrls));
1477
1478 if (si476x_core_has_am(radio->core)) {
1479 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1480 &si476x_ctrl_ops,
1481 V4L2_CID_POWER_LINE_FREQUENCY,
1482 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1483 0, 0);
1484 rval = radio->ctrl_handler.error;
1485 if (ctrl == NULL && rval) {
1486 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1487 rval);
1488 goto exit;
1489 }
1490
1491 rval = si476x_radio_add_new_custom(radio,
1492 SI476X_IDX_HARMONICS_COUNT);
1493 if (rval < 0)
1494 goto exit;
1495 }
1496
1497 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1498 if (rval < 0)
1499 goto exit;
1500
1501 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1502 if (rval < 0)
1503 goto exit;
1504
1505 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1506 if (rval < 0)
1507 goto exit;
1508
1509 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1510 &si476x_ctrl_ops,
1511 V4L2_CID_TUNE_DEEMPHASIS,
1512 V4L2_DEEMPHASIS_75_uS, 0, 0);
1513 rval = radio->ctrl_handler.error;
1514 if (ctrl == NULL && rval) {
1515 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1516 rval);
1517 goto exit;
1518 }
1519
1520 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1521 V4L2_CID_RDS_RECEPTION,
1522 0, 1, 1, 1);
1523 rval = radio->ctrl_handler.error;
1524 if (ctrl == NULL && rval) {
1525 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1526 rval);
1527 goto exit;
1528 }
1529
1530 if (si476x_core_has_diversity(radio->core)) {
1531 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1532 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1533 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1534 if (rval < 0)
1535 goto exit;
1536
1537 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1538 if (rval < 0)
1539 goto exit;
1540 }
1541
1542 /* register video device */
1543 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1544 if (rval < 0) {
1545 dev_err(&pdev->dev, "Could not register video device\n");
1546 goto exit;
1547 }
1548
1549 rval = si476x_radio_init_debugfs(radio);
1550 if (rval < 0) {
1551 dev_err(&pdev->dev, "Could not creat debugfs interface\n");
1552 goto exit;
1553 }
1554
1555 return 0;
1556 exit:
1557 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1558 return rval;
1559 }
1560
1561 static int si476x_radio_remove(struct platform_device *pdev)
1562 {
1563 struct si476x_radio *radio = platform_get_drvdata(pdev);
1564
1565 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1566 video_unregister_device(&radio->videodev);
1567 v4l2_device_unregister(&radio->v4l2dev);
1568 debugfs_remove_recursive(radio->debugfs);
1569
1570 return 0;
1571 }
1572
1573 MODULE_ALIAS("platform:si476x-radio");
1574
1575 static struct platform_driver si476x_radio_driver = {
1576 .driver = {
1577 .name = DRIVER_NAME,
1578 },
1579 .probe = si476x_radio_probe,
1580 .remove = si476x_radio_remove,
1581 };
1582 module_platform_driver(si476x_radio_driver);
1583
1584 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1585 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1586 MODULE_LICENSE("GPL");
Linux with added FPC-III support