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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / media / radio / radio-si476x.c
blobb203296de9779d57ab2c2bef5c4d34c734c883ca
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips
4 *
5 * Copyright (C) 2012 Innovative Converged Devices(ICD)
6 * Copyright (C) 2013 Andrey Smirnov
7 *
8 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/delay.h>
13 #include <linux/interrupt.h>
14 #include <linux/slab.h>
15 #include <linux/atomic.h>
16 #include <linux/videodev2.h>
17 #include <linux/mutex.h>
18 #include <linux/debugfs.h>
19 #include <media/v4l2-common.h>
20 #include <media/v4l2-ioctl.h>
21 #include <media/v4l2-ctrls.h>
22 #include <media/v4l2-event.h>
23 #include <media/v4l2-device.h>
24
25 #include <media/drv-intf/si476x.h>
26 #include <linux/mfd/si476x-core.h>
27
28 #define FM_FREQ_RANGE_LOW 64000000
29 #define FM_FREQ_RANGE_HIGH 108000000
30
31 #define AM_FREQ_RANGE_LOW 520000
32 #define AM_FREQ_RANGE_HIGH 30000000
33
34 #define PWRLINEFLTR (1 << 8)
35
36 #define FREQ_MUL (10000000 / 625)
37
38 #define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0x80 & (status))
39
40 #define DRIVER_NAME "si476x-radio"
41 #define DRIVER_CARD "SI476x AM/FM Receiver"
42
43 enum si476x_freq_bands {
44 SI476X_BAND_FM,
45 SI476X_BAND_AM,
46 };
47
48 static const struct v4l2_frequency_band si476x_bands[] = {
49 [SI476X_BAND_FM] = {
50 .type = V4L2_TUNER_RADIO,
51 .index = SI476X_BAND_FM,
52 .capability = V4L2_TUNER_CAP_LOW
53 | V4L2_TUNER_CAP_STEREO
54 | V4L2_TUNER_CAP_RDS
55 | V4L2_TUNER_CAP_RDS_BLOCK_IO
56 | V4L2_TUNER_CAP_FREQ_BANDS,
57 .rangelow = 64 * FREQ_MUL,
58 .rangehigh = 108 * FREQ_MUL,
59 .modulation = V4L2_BAND_MODULATION_FM,
60 },
61 [SI476X_BAND_AM] = {
62 .type = V4L2_TUNER_RADIO,
63 .index = SI476X_BAND_AM,
64 .capability = V4L2_TUNER_CAP_LOW
65 | V4L2_TUNER_CAP_FREQ_BANDS,
66 .rangelow = 0.52 * FREQ_MUL,
67 .rangehigh = 30 * FREQ_MUL,
68 .modulation = V4L2_BAND_MODULATION_AM,
69 },
70 };
71
72 static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band)
73 {
74 return freq >= si476x_bands[band].rangelow &&
75 freq <= si476x_bands[band].rangehigh;
76 }
77
78 static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high,
79 int band)
80 {
81 return low >= si476x_bands[band].rangelow &&
82 high <= si476x_bands[band].rangehigh;
83 }
84
85 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl);
86 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl);
87
88 enum phase_diversity_modes_idx {
89 SI476X_IDX_PHDIV_DISABLED,
90 SI476X_IDX_PHDIV_PRIMARY_COMBINING,
91 SI476X_IDX_PHDIV_PRIMARY_ANTENNA,
92 SI476X_IDX_PHDIV_SECONDARY_ANTENNA,
93 SI476X_IDX_PHDIV_SECONDARY_COMBINING,
94 };
95
96 static const char * const phase_diversity_modes[] = {
97 [SI476X_IDX_PHDIV_DISABLED] = "Disabled",
98 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary",
99 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna",
100 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna",
101 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary",
102 };
103
104 static inline enum phase_diversity_modes_idx
105 si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode)
106 {
107 switch (mode) {
108 default: /* FALLTHROUGH */
109 case SI476X_PHDIV_DISABLED:
110 return SI476X_IDX_PHDIV_DISABLED;
111 case SI476X_PHDIV_PRIMARY_COMBINING:
112 return SI476X_IDX_PHDIV_PRIMARY_COMBINING;
113 case SI476X_PHDIV_PRIMARY_ANTENNA:
114 return SI476X_IDX_PHDIV_PRIMARY_ANTENNA;
115 case SI476X_PHDIV_SECONDARY_ANTENNA:
116 return SI476X_IDX_PHDIV_SECONDARY_ANTENNA;
117 case SI476X_PHDIV_SECONDARY_COMBINING:
118 return SI476X_IDX_PHDIV_SECONDARY_COMBINING;
119 }
120 }
121
122 static inline enum si476x_phase_diversity_mode
123 si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx)
124 {
125 static const int idx_to_value[] = {
126 [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED,
127 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING,
128 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA,
129 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA,
130 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING,
131 };
132
133 return idx_to_value[idx];
134 }
135
136 static const struct v4l2_ctrl_ops si476x_ctrl_ops = {
137 .g_volatile_ctrl = si476x_radio_g_volatile_ctrl,
138 .s_ctrl = si476x_radio_s_ctrl,
139 };
140
141
142 enum si476x_ctrl_idx {
143 SI476X_IDX_RSSI_THRESHOLD,
144 SI476X_IDX_SNR_THRESHOLD,
145 SI476X_IDX_MAX_TUNE_ERROR,
146 SI476X_IDX_HARMONICS_COUNT,
147 SI476X_IDX_DIVERSITY_MODE,
148 SI476X_IDX_INTERCHIP_LINK,
149 };
150 static struct v4l2_ctrl_config si476x_ctrls[] = {
151
152 /*
153 * SI476X during its station seeking(or tuning) process uses several
154 * parameters to detrmine if "the station" is valid:
155 *
156 * - Signal's SNR(in dBuV) must be lower than
157 * #V4L2_CID_SI476X_SNR_THRESHOLD
158 * - Signal's RSSI(in dBuV) must be greater than
159 * #V4L2_CID_SI476X_RSSI_THRESHOLD
160 * - Signal's frequency deviation(in units of 2ppm) must not be
161 * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR
162 */
163 [SI476X_IDX_RSSI_THRESHOLD] = {
164 .ops = &si476x_ctrl_ops,
165 .id = V4L2_CID_SI476X_RSSI_THRESHOLD,
166 .name = "Valid RSSI Threshold",
167 .type = V4L2_CTRL_TYPE_INTEGER,
168 .min = -128,
169 .max = 127,
170 .step = 1,
171 },
172 [SI476X_IDX_SNR_THRESHOLD] = {
173 .ops = &si476x_ctrl_ops,
174 .id = V4L2_CID_SI476X_SNR_THRESHOLD,
175 .type = V4L2_CTRL_TYPE_INTEGER,
176 .name = "Valid SNR Threshold",
177 .min = -128,
178 .max = 127,
179 .step = 1,
180 },
181 [SI476X_IDX_MAX_TUNE_ERROR] = {
182 .ops = &si476x_ctrl_ops,
183 .id = V4L2_CID_SI476X_MAX_TUNE_ERROR,
184 .type = V4L2_CTRL_TYPE_INTEGER,
185 .name = "Max Tune Errors",
186 .min = 0,
187 .max = 126 * 2,
188 .step = 2,
189 },
190
191 /*
192 * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics
193 * built-in power-line noise supression filter is to reject
194 * during AM-mode operation.
195 */
196 [SI476X_IDX_HARMONICS_COUNT] = {
197 .ops = &si476x_ctrl_ops,
198 .id = V4L2_CID_SI476X_HARMONICS_COUNT,
199 .type = V4L2_CTRL_TYPE_INTEGER,
200
201 .name = "Count of Harmonics to Reject",
202 .min = 0,
203 .max = 20,
204 .step = 1,
205 },
206
207 /*
208 * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which
209 * two tuners working in diversity mode are to work in.
210 *
211 * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled
212 * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is
213 * on, primary tuner's antenna is the main one.
214 * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is
215 * off, primary tuner's antenna is the main one.
216 * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is
217 * off, secondary tuner's antenna is the main one.
218 * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is
219 * on, secondary tuner's antenna is the main one.
220 */
221 [SI476X_IDX_DIVERSITY_MODE] = {
222 .ops = &si476x_ctrl_ops,
223 .id = V4L2_CID_SI476X_DIVERSITY_MODE,
224 .type = V4L2_CTRL_TYPE_MENU,
225 .name = "Phase Diversity Mode",
226 .qmenu = phase_diversity_modes,
227 .min = 0,
228 .max = ARRAY_SIZE(phase_diversity_modes) - 1,
229 },
230
231 /*
232 * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in
233 * diversity mode indicator. Allows user to determine if two
234 * chips working in diversity mode have established a link
235 * between each other and if the system as a whole uses
236 * signals from both antennas to receive FM radio.
237 */
238 [SI476X_IDX_INTERCHIP_LINK] = {
239 .ops = &si476x_ctrl_ops,
240 .id = V4L2_CID_SI476X_INTERCHIP_LINK,
241 .type = V4L2_CTRL_TYPE_BOOLEAN,
242 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE,
243 .name = "Inter-Chip Link",
244 .min = 0,
245 .max = 1,
246 .step = 1,
247 },
248 };
249
250 struct si476x_radio;
251
252 /**
253 * struct si476x_radio_ops - vtable of tuner functions
254 *
255 * This table holds pointers to functions implementing particular
256 * operations depending on the mode in which the tuner chip was
257 * configured to start in. If the function is not supported
258 * corresponding element is set to #NULL.
259 *
260 * @tune_freq: Tune chip to a specific frequency
261 * @seek_start: Star station seeking
262 * @rsq_status: Get Received Signal Quality(RSQ) status
263 * @rds_blckcnt: Get received RDS blocks count
264 * @phase_diversity: Change phase diversity mode of the tuner
265 * @phase_div_status: Get phase diversity mode status
266 * @acf_status: Get the status of Automatically Controlled
267 * Features(ACF)
268 * @agc_status: Get Automatic Gain Control(AGC) status
269 */
270 struct si476x_radio_ops {
271 int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *);
272 int (*seek_start)(struct si476x_core *, bool, bool);
273 int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *,
274 struct si476x_rsq_status_report *);
275 int (*rds_blckcnt)(struct si476x_core *, bool,
276 struct si476x_rds_blockcount_report *);
277
278 int (*phase_diversity)(struct si476x_core *,
279 enum si476x_phase_diversity_mode);
280 int (*phase_div_status)(struct si476x_core *);
281 int (*acf_status)(struct si476x_core *,
282 struct si476x_acf_status_report *);
283 int (*agc_status)(struct si476x_core *,
284 struct si476x_agc_status_report *);
285 };
286
287 /**
288 * struct si476x_radio - radio device
289 *
290 * @v4l2dev: Pointer to V4L2 device created by V4L2 subsystem
291 * @videodev: Pointer to video device created by V4L2 subsystem
292 * @ctrl_handler: V4L2 controls handler
293 * @core: Pointer to underlying core device
294 * @ops: Vtable of functions. See struct si476x_radio_ops for details
295 * @debugfs: pointer to &strucd dentry for debugfs
296 * @audmode: audio mode, as defined for the rxsubchans field
297 * at videodev2.h
298 *
299 * core structure is the radio device is being used
300 */
301 struct si476x_radio {
302 struct v4l2_device v4l2dev;
303 struct video_device videodev;
304 struct v4l2_ctrl_handler ctrl_handler;
305
306 struct si476x_core *core;
307 /* This field should not be accesses unless core lock is held */
308 const struct si476x_radio_ops *ops;
309
310 struct dentry *debugfs;
311 u32 audmode;
312 };
313
314 static inline struct si476x_radio *
315 v4l2_dev_to_radio(struct v4l2_device *d)
316 {
317 return container_of(d, struct si476x_radio, v4l2dev);
318 }
319
320 static inline struct si476x_radio *
321 v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d)
322 {
323 return container_of(d, struct si476x_radio, ctrl_handler);
324 }
325
326 /*
327 * si476x_vidioc_querycap - query device capabilities
328 */
329 static int si476x_radio_querycap(struct file *file, void *priv,
330 struct v4l2_capability *capability)
331 {
332 struct si476x_radio *radio = video_drvdata(file);
333
334 strscpy(capability->driver, radio->v4l2dev.name,
335 sizeof(capability->driver));
336 strscpy(capability->card, DRIVER_CARD, sizeof(capability->card));
337 snprintf(capability->bus_info, sizeof(capability->bus_info),
338 "platform:%s", radio->v4l2dev.name);
339 return 0;
340 }
341
342 static int si476x_radio_enum_freq_bands(struct file *file, void *priv,
343 struct v4l2_frequency_band *band)
344 {
345 int err;
346 struct si476x_radio *radio = video_drvdata(file);
347
348 if (band->tuner != 0)
349 return -EINVAL;
350
351 switch (radio->core->chip_id) {
352 /* AM/FM tuners -- all bands are supported */
353 case SI476X_CHIP_SI4761:
354 case SI476X_CHIP_SI4764:
355 if (band->index < ARRAY_SIZE(si476x_bands)) {
356 *band = si476x_bands[band->index];
357 err = 0;
358 } else {
359 err = -EINVAL;
360 }
361 break;
362 /* FM companion tuner chips -- only FM bands are
363 * supported */
364 case SI476X_CHIP_SI4768:
365 if (band->index == SI476X_BAND_FM) {
366 *band = si476x_bands[band->index];
367 err = 0;
368 } else {
369 err = -EINVAL;
370 }
371 break;
372 default:
373 err = -EINVAL;
374 }
375
376 return err;
377 }
378
379 static int si476x_radio_g_tuner(struct file *file, void *priv,
380 struct v4l2_tuner *tuner)
381 {
382 int err;
383 struct si476x_rsq_status_report report;
384 struct si476x_radio *radio = video_drvdata(file);
385
386 struct si476x_rsq_status_args args = {
387 .primary = false,
388 .rsqack = false,
389 .attune = false,
390 .cancel = false,
391 .stcack = false,
392 };
393
394 if (tuner->index != 0)
395 return -EINVAL;
396
397 tuner->type = V4L2_TUNER_RADIO;
398 tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies
399 * in multiples of
400 * 62.5 Hz */
401 | V4L2_TUNER_CAP_STEREO
402 | V4L2_TUNER_CAP_HWSEEK_BOUNDED
403 | V4L2_TUNER_CAP_HWSEEK_WRAP
404 | V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
405
406 si476x_core_lock(radio->core);
407
408 if (si476x_core_is_a_secondary_tuner(radio->core)) {
409 strscpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
410 tuner->rxsubchans = 0;
411 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
412 } else if (si476x_core_has_am(radio->core)) {
413 if (si476x_core_is_a_primary_tuner(radio->core))
414 strscpy(tuner->name, "AM/FM (primary)",
415 sizeof(tuner->name));
416 else
417 strscpy(tuner->name, "AM/FM", sizeof(tuner->name));
418
419 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO
420 | V4L2_TUNER_SUB_RDS;
421 tuner->capability |= V4L2_TUNER_CAP_RDS
422 | V4L2_TUNER_CAP_RDS_BLOCK_IO
423 | V4L2_TUNER_CAP_FREQ_BANDS;
424
425 tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
426 } else {
427 strscpy(tuner->name, "FM", sizeof(tuner->name));
428 tuner->rxsubchans = V4L2_TUNER_SUB_RDS;
429 tuner->capability |= V4L2_TUNER_CAP_RDS
430 | V4L2_TUNER_CAP_RDS_BLOCK_IO
431 | V4L2_TUNER_CAP_FREQ_BANDS;
432 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
433 }
434
435 tuner->audmode = radio->audmode;
436
437 tuner->afc = 1;
438 tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
439
440 err = radio->ops->rsq_status(radio->core,
441 &args, &report);
442 if (err < 0) {
443 tuner->signal = 0;
444 } else {
445 /*
446 * tuner->signal value range: 0x0000 .. 0xFFFF,
447 * report.rssi: -128 .. 127
448 */
449 tuner->signal = (report.rssi + 128) * 257;
450 }
451 si476x_core_unlock(radio->core);
452
453 return err;
454 }
455
456 static int si476x_radio_s_tuner(struct file *file, void *priv,
457 const struct v4l2_tuner *tuner)
458 {
459 struct si476x_radio *radio = video_drvdata(file);
460
461 if (tuner->index != 0)
462 return -EINVAL;
463
464 if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
465 tuner->audmode == V4L2_TUNER_MODE_STEREO)
466 radio->audmode = tuner->audmode;
467 else
468 radio->audmode = V4L2_TUNER_MODE_STEREO;
469
470 return 0;
471 }
472
473 static int si476x_radio_init_vtable(struct si476x_radio *radio,
474 enum si476x_func func)
475 {
476 static const struct si476x_radio_ops fm_ops = {
477 .tune_freq = si476x_core_cmd_fm_tune_freq,
478 .seek_start = si476x_core_cmd_fm_seek_start,
479 .rsq_status = si476x_core_cmd_fm_rsq_status,
480 .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount,
481 .phase_diversity = si476x_core_cmd_fm_phase_diversity,
482 .phase_div_status = si476x_core_cmd_fm_phase_div_status,
483 .acf_status = si476x_core_cmd_fm_acf_status,
484 .agc_status = si476x_core_cmd_agc_status,
485 };
486
487 static const struct si476x_radio_ops am_ops = {
488 .tune_freq = si476x_core_cmd_am_tune_freq,
489 .seek_start = si476x_core_cmd_am_seek_start,
490 .rsq_status = si476x_core_cmd_am_rsq_status,
491 .rds_blckcnt = NULL,
492 .phase_diversity = NULL,
493 .phase_div_status = NULL,
494 .acf_status = si476x_core_cmd_am_acf_status,
495 .agc_status = NULL,
496 };
497
498 switch (func) {
499 case SI476X_FUNC_FM_RECEIVER:
500 radio->ops = &fm_ops;
501 return 0;
502
503 case SI476X_FUNC_AM_RECEIVER:
504 radio->ops = &am_ops;
505 return 0;
506 default:
507 WARN(1, "Unexpected tuner function value\n");
508 return -EINVAL;
509 }
510 }
511
512 static int si476x_radio_pretune(struct si476x_radio *radio,
513 enum si476x_func func)
514 {
515 int retval;
516
517 struct si476x_tune_freq_args args = {
518 .zifsr = false,
519 .hd = false,
520 .injside = SI476X_INJSIDE_AUTO,
521 .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE,
522 .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO,
523 .antcap = 0,
524 };
525
526 switch (func) {
527 case SI476X_FUNC_FM_RECEIVER:
528 args.freq = v4l2_to_si476x(radio->core,
529 92 * FREQ_MUL);
530 retval = radio->ops->tune_freq(radio->core, &args);
531 break;
532 case SI476X_FUNC_AM_RECEIVER:
533 args.freq = v4l2_to_si476x(radio->core,
534 0.6 * FREQ_MUL);
535 retval = radio->ops->tune_freq(radio->core, &args);
536 break;
537 default:
538 WARN(1, "Unexpected tuner function value\n");
539 retval = -EINVAL;
540 }
541
542 return retval;
543 }
544 static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
545 enum si476x_func func)
546 {
547 int err;
548
549 /* regcache_mark_dirty(radio->core->regmap); */
550 err = regcache_sync_region(radio->core->regmap,
551 SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
552 SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
553 if (err < 0)
554 return err;
555
556 err = regcache_sync_region(radio->core->regmap,
557 SI476X_PROP_AUDIO_DEEMPHASIS,
558 SI476X_PROP_AUDIO_PWR_LINE_FILTER);
559 if (err < 0)
560 return err;
561
562 err = regcache_sync_region(radio->core->regmap,
563 SI476X_PROP_INT_CTL_ENABLE,
564 SI476X_PROP_INT_CTL_ENABLE);
565 if (err < 0)
566 return err;
567
568 /*
569 * Is there any point in restoring SNR and the like
570 * when switching between AM/FM?
571 */
572 err = regcache_sync_region(radio->core->regmap,
573 SI476X_PROP_VALID_MAX_TUNE_ERROR,
574 SI476X_PROP_VALID_MAX_TUNE_ERROR);
575 if (err < 0)
576 return err;
577
578 err = regcache_sync_region(radio->core->regmap,
579 SI476X_PROP_VALID_SNR_THRESHOLD,
580 SI476X_PROP_VALID_RSSI_THRESHOLD);
581 if (err < 0)
582 return err;
583
584 if (func == SI476X_FUNC_FM_RECEIVER) {
585 if (si476x_core_has_diversity(radio->core)) {
586 err = si476x_core_cmd_fm_phase_diversity(radio->core,
587 radio->core->diversity_mode);
588 if (err < 0)
589 return err;
590 }
591
592 err = regcache_sync_region(radio->core->regmap,
593 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
594 SI476X_PROP_FM_RDS_CONFIG);
595 if (err < 0)
596 return err;
597 }
598
599 return si476x_radio_init_vtable(radio, func);
600
601 }
602
603 static int si476x_radio_change_func(struct si476x_radio *radio,
604 enum si476x_func func)
605 {
606 int err;
607 bool soft;
608 /*
609 * Since power/up down is a very time consuming operation,
610 * try to avoid doing it if the requested mode matches the one
611 * the tuner is in
612 */
613 if (func == radio->core->power_up_parameters.func)
614 return 0;
615
616 soft = true;
617 err = si476x_core_stop(radio->core, soft);
618 if (err < 0) {
619 /*
620 * OK, if the chip does not want to play nice let's
621 * try to reset it in more brutal way
622 */
623 soft = false;
624 err = si476x_core_stop(radio->core, soft);
625 if (err < 0)
626 return err;
627 }
628 /*
629 Set the desired radio tuner function
630 */
631 radio->core->power_up_parameters.func = func;
632
633 err = si476x_core_start(radio->core, soft);
634 if (err < 0)
635 return err;
636
637 /*
638 * No need to do the rest of manipulations for the bootlader
639 * mode
640 */
641 if (func != SI476X_FUNC_FM_RECEIVER &&
642 func != SI476X_FUNC_AM_RECEIVER)
643 return err;
644
645 return si476x_radio_do_post_powerup_init(radio, func);
646 }
647
648 static int si476x_radio_g_frequency(struct file *file, void *priv,
649 struct v4l2_frequency *f)
650 {
651 int err;
652 struct si476x_radio *radio = video_drvdata(file);
653
654 if (f->tuner != 0 ||
655 f->type != V4L2_TUNER_RADIO)
656 return -EINVAL;
657
658 si476x_core_lock(radio->core);
659
660 if (radio->ops->rsq_status) {
661 struct si476x_rsq_status_report report;
662 struct si476x_rsq_status_args args = {
663 .primary = false,
664 .rsqack = false,
665 .attune = true,
666 .cancel = false,
667 .stcack = false,
668 };
669
670 err = radio->ops->rsq_status(radio->core, &args, &report);
671 if (!err)
672 f->frequency = si476x_to_v4l2(radio->core,
673 report.readfreq);
674 } else {
675 err = -EINVAL;
676 }
677
678 si476x_core_unlock(radio->core);
679
680 return err;
681 }
682
683 static int si476x_radio_s_frequency(struct file *file, void *priv,
684 const struct v4l2_frequency *f)
685 {
686 int err;
687 u32 freq = f->frequency;
688 struct si476x_tune_freq_args args;
689 struct si476x_radio *radio = video_drvdata(file);
690
691 const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
692 si476x_bands[SI476X_BAND_FM].rangelow) / 2;
693 const int band = (freq > midrange) ?
694 SI476X_BAND_FM : SI476X_BAND_AM;
695 const enum si476x_func func = (band == SI476X_BAND_AM) ?
696 SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
697
698 if (f->tuner != 0 ||
699 f->type != V4L2_TUNER_RADIO)
700 return -EINVAL;
701
702 si476x_core_lock(radio->core);
703
704 freq = clamp(freq,
705 si476x_bands[band].rangelow,
706 si476x_bands[band].rangehigh);
707
708 if (si476x_radio_freq_is_inside_of_the_band(freq,
709 SI476X_BAND_AM) &&
710 (!si476x_core_has_am(radio->core) ||
711 si476x_core_is_a_secondary_tuner(radio->core))) {
712 err = -EINVAL;
713 goto unlock;
714 }
715
716 err = si476x_radio_change_func(radio, func);
717 if (err < 0)
718 goto unlock;
719
720 args.zifsr = false;
721 args.hd = false;
722 args.injside = SI476X_INJSIDE_AUTO;
723 args.freq = v4l2_to_si476x(radio->core, freq);
724 args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE;
725 args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO;
726 args.antcap = 0;
727
728 err = radio->ops->tune_freq(radio->core, &args);
729
730 unlock:
731 si476x_core_unlock(radio->core);
732 return err;
733 }
734
735 static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
736 const struct v4l2_hw_freq_seek *seek)
737 {
738 int err;
739 enum si476x_func func;
740 u32 rangelow = seek->rangelow, rangehigh = seek->rangehigh;
741 struct si476x_radio *radio = video_drvdata(file);
742
743 if (file->f_flags & O_NONBLOCK)
744 return -EAGAIN;
745
746 if (seek->tuner != 0 ||
747 seek->type != V4L2_TUNER_RADIO)
748 return -EINVAL;
749
750 si476x_core_lock(radio->core);
751
752 if (!rangelow) {
753 err = regmap_read(radio->core->regmap,
754 SI476X_PROP_SEEK_BAND_BOTTOM,
755 &rangelow);
756 if (err)
757 goto unlock;
758 rangelow = si476x_to_v4l2(radio->core, rangelow);
759 }
760 if (!rangehigh) {
761 err = regmap_read(radio->core->regmap,
762 SI476X_PROP_SEEK_BAND_TOP,
763 &rangehigh);
764 if (err)
765 goto unlock;
766 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
767 }
768
769 if (rangelow > rangehigh) {
770 err = -EINVAL;
771 goto unlock;
772 }
773
774 if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
775 SI476X_BAND_FM)) {
776 func = SI476X_FUNC_FM_RECEIVER;
777
778 } else if (si476x_core_has_am(radio->core) &&
779 si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
780 SI476X_BAND_AM)) {
781 func = SI476X_FUNC_AM_RECEIVER;
782 } else {
783 err = -EINVAL;
784 goto unlock;
785 }
786
787 err = si476x_radio_change_func(radio, func);
788 if (err < 0)
789 goto unlock;
790
791 if (seek->rangehigh) {
792 err = regmap_write(radio->core->regmap,
793 SI476X_PROP_SEEK_BAND_TOP,
794 v4l2_to_si476x(radio->core,
795 seek->rangehigh));
796 if (err)
797 goto unlock;
798 }
799 if (seek->rangelow) {
800 err = regmap_write(radio->core->regmap,
801 SI476X_PROP_SEEK_BAND_BOTTOM,
802 v4l2_to_si476x(radio->core,
803 seek->rangelow));
804 if (err)
805 goto unlock;
806 }
807 if (seek->spacing) {
808 err = regmap_write(radio->core->regmap,
809 SI476X_PROP_SEEK_FREQUENCY_SPACING,
810 v4l2_to_si476x(radio->core,
811 seek->spacing));
812 if (err)
813 goto unlock;
814 }
815
816 err = radio->ops->seek_start(radio->core,
817 seek->seek_upward,
818 seek->wrap_around);
819 unlock:
820 si476x_core_unlock(radio->core);
821
822
823
824 return err;
825 }
826
827 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
828 {
829 int retval;
830 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
831
832 si476x_core_lock(radio->core);
833
834 switch (ctrl->id) {
835 case V4L2_CID_SI476X_INTERCHIP_LINK:
836 if (si476x_core_has_diversity(radio->core)) {
837 if (radio->ops->phase_diversity) {
838 retval = radio->ops->phase_div_status(radio->core);
839 if (retval < 0)
840 break;
841
842 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
843 retval = 0;
844 break;
845 } else {
846 retval = -ENOTTY;
847 break;
848 }
849 }
850 retval = -EINVAL;
851 break;
852 default:
853 retval = -EINVAL;
854 break;
855 }
856 si476x_core_unlock(radio->core);
857 return retval;
858
859 }
860
861 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
862 {
863 int retval;
864 enum si476x_phase_diversity_mode mode;
865 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
866
867 si476x_core_lock(radio->core);
868
869 switch (ctrl->id) {
870 case V4L2_CID_SI476X_HARMONICS_COUNT:
871 retval = regmap_update_bits(radio->core->regmap,
872 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
873 SI476X_PROP_PWR_HARMONICS_MASK,
874 ctrl->val);
875 break;
876 case V4L2_CID_POWER_LINE_FREQUENCY:
877 switch (ctrl->val) {
878 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
879 retval = regmap_update_bits(radio->core->regmap,
880 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
881 SI476X_PROP_PWR_ENABLE_MASK,
882 0);
883 break;
884 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
885 retval = regmap_update_bits(radio->core->regmap,
886 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
887 SI476X_PROP_PWR_GRID_MASK,
888 SI476X_PROP_PWR_GRID_50HZ);
889 break;
890 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
891 retval = regmap_update_bits(radio->core->regmap,
892 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
893 SI476X_PROP_PWR_GRID_MASK,
894 SI476X_PROP_PWR_GRID_60HZ);
895 break;
896 default:
897 retval = -EINVAL;
898 break;
899 }
900 break;
901 case V4L2_CID_SI476X_RSSI_THRESHOLD:
902 retval = regmap_write(radio->core->regmap,
903 SI476X_PROP_VALID_RSSI_THRESHOLD,
904 ctrl->val);
905 break;
906 case V4L2_CID_SI476X_SNR_THRESHOLD:
907 retval = regmap_write(radio->core->regmap,
908 SI476X_PROP_VALID_SNR_THRESHOLD,
909 ctrl->val);
910 break;
911 case V4L2_CID_SI476X_MAX_TUNE_ERROR:
912 retval = regmap_write(radio->core->regmap,
913 SI476X_PROP_VALID_MAX_TUNE_ERROR,
914 ctrl->val);
915 break;
916 case V4L2_CID_RDS_RECEPTION:
917 /*
918 * It looks like RDS related properties are
919 * inaccesable when tuner is in AM mode, so cache the
920 * changes
921 */
922 if (si476x_core_is_in_am_receiver_mode(radio->core))
923 regcache_cache_only(radio->core->regmap, true);
924
925 if (ctrl->val) {
926 retval = regmap_write(radio->core->regmap,
927 SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
928 radio->core->rds_fifo_depth);
929 if (retval < 0)
930 break;
931
932 if (radio->core->client->irq) {
933 retval = regmap_write(radio->core->regmap,
934 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
935 SI476X_RDSRECV);
936 if (retval < 0)
937 break;
938 }
939
940 /* Drain RDS FIFO before enabling RDS processing */
941 retval = si476x_core_cmd_fm_rds_status(radio->core,
942 false,
943 true,
944 true,
945 NULL);
946 if (retval < 0)
947 break;
948
949 retval = regmap_update_bits(radio->core->regmap,
950 SI476X_PROP_FM_RDS_CONFIG,
951 SI476X_PROP_RDSEN_MASK,
952 SI476X_PROP_RDSEN);
953 } else {
954 retval = regmap_update_bits(radio->core->regmap,
955 SI476X_PROP_FM_RDS_CONFIG,
956 SI476X_PROP_RDSEN_MASK,
957 !SI476X_PROP_RDSEN);
958 }
959
960 if (si476x_core_is_in_am_receiver_mode(radio->core))
961 regcache_cache_only(radio->core->regmap, false);
962 break;
963 case V4L2_CID_TUNE_DEEMPHASIS:
964 retval = regmap_write(radio->core->regmap,
965 SI476X_PROP_AUDIO_DEEMPHASIS,
966 ctrl->val);
967 break;
968
969 case V4L2_CID_SI476X_DIVERSITY_MODE:
970 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
971
972 if (mode == radio->core->diversity_mode) {
973 retval = 0;
974 break;
975 }
976
977 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
978 /*
979 * Diversity cannot be configured while tuner
980 * is in AM mode so save the changes and carry on.
981 */
982 radio->core->diversity_mode = mode;
983 retval = 0;
984 } else {
985 retval = radio->ops->phase_diversity(radio->core, mode);
986 if (!retval)
987 radio->core->diversity_mode = mode;
988 }
989 break;
990
991 default:
992 retval = -EINVAL;
993 break;
994 }
995
996 si476x_core_unlock(radio->core);
997
998 return retval;
999 }
1000
1001 #ifdef CONFIG_VIDEO_ADV_DEBUG
1002 static int si476x_radio_g_register(struct file *file, void *fh,
1003 struct v4l2_dbg_register *reg)
1004 {
1005 int err;
1006 unsigned int value;
1007 struct si476x_radio *radio = video_drvdata(file);
1008
1009 si476x_core_lock(radio->core);
1010 reg->size = 2;
1011 err = regmap_read(radio->core->regmap,
1012 (unsigned int)reg->reg, &value);
1013 reg->val = value;
1014 si476x_core_unlock(radio->core);
1015
1016 return err;
1017 }
1018 static int si476x_radio_s_register(struct file *file, void *fh,
1019 const struct v4l2_dbg_register *reg)
1020 {
1021
1022 int err;
1023 struct si476x_radio *radio = video_drvdata(file);
1024
1025 si476x_core_lock(radio->core);
1026 err = regmap_write(radio->core->regmap,
1027 (unsigned int)reg->reg,
1028 (unsigned int)reg->val);
1029 si476x_core_unlock(radio->core);
1030
1031 return err;
1032 }
1033 #endif
1034
1035 static int si476x_radio_fops_open(struct file *file)
1036 {
1037 struct si476x_radio *radio = video_drvdata(file);
1038 int err;
1039
1040 err = v4l2_fh_open(file);
1041 if (err)
1042 return err;
1043
1044 if (v4l2_fh_is_singular_file(file)) {
1045 si476x_core_lock(radio->core);
1046 err = si476x_core_set_power_state(radio->core,
1047 SI476X_POWER_UP_FULL);
1048 if (err < 0)
1049 goto done;
1050
1051 err = si476x_radio_do_post_powerup_init(radio,
1052 radio->core->power_up_parameters.func);
1053 if (err < 0)
1054 goto power_down;
1055
1056 err = si476x_radio_pretune(radio,
1057 radio->core->power_up_parameters.func);
1058 if (err < 0)
1059 goto power_down;
1060
1061 si476x_core_unlock(radio->core);
1062 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1063 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1064 }
1065
1066 return err;
1067
1068 power_down:
1069 si476x_core_set_power_state(radio->core,
1070 SI476X_POWER_DOWN);
1071 done:
1072 si476x_core_unlock(radio->core);
1073 v4l2_fh_release(file);
1074
1075 return err;
1076 }
1077
1078 static int si476x_radio_fops_release(struct file *file)
1079 {
1080 int err;
1081 struct si476x_radio *radio = video_drvdata(file);
1082
1083 if (v4l2_fh_is_singular_file(file) &&
1084 atomic_read(&radio->core->is_alive))
1085 si476x_core_set_power_state(radio->core,
1086 SI476X_POWER_DOWN);
1087
1088 err = v4l2_fh_release(file);
1089
1090 return err;
1091 }
1092
1093 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1094 size_t count, loff_t *ppos)
1095 {
1096 ssize_t rval;
1097 size_t fifo_len;
1098 unsigned int copied;
1099
1100 struct si476x_radio *radio = video_drvdata(file);
1101
1102 /* block if no new data available */
1103 if (kfifo_is_empty(&radio->core->rds_fifo)) {
1104 if (file->f_flags & O_NONBLOCK)
1105 return -EWOULDBLOCK;
1106
1107 rval = wait_event_interruptible(radio->core->rds_read_queue,
1108 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1109 !atomic_read(&radio->core->is_alive)));
1110 if (rval < 0)
1111 return -EINTR;
1112
1113 if (!atomic_read(&radio->core->is_alive))
1114 return -ENODEV;
1115 }
1116
1117 fifo_len = kfifo_len(&radio->core->rds_fifo);
1118
1119 if (kfifo_to_user(&radio->core->rds_fifo, buf,
1120 min(fifo_len, count),
1121 &copied) != 0) {
1122 dev_warn(&radio->videodev.dev,
1123 "Error during FIFO to userspace copy\n");
1124 rval = -EIO;
1125 } else {
1126 rval = (ssize_t)copied;
1127 }
1128
1129 return rval;
1130 }
1131
1132 static __poll_t si476x_radio_fops_poll(struct file *file,
1133 struct poll_table_struct *pts)
1134 {
1135 struct si476x_radio *radio = video_drvdata(file);
1136 __poll_t req_events = poll_requested_events(pts);
1137 __poll_t err = v4l2_ctrl_poll(file, pts);
1138
1139 if (req_events & (EPOLLIN | EPOLLRDNORM)) {
1140 if (atomic_read(&radio->core->is_alive))
1141 poll_wait(file, &radio->core->rds_read_queue, pts);
1142
1143 if (!atomic_read(&radio->core->is_alive))
1144 err = EPOLLHUP;
1145
1146 if (!kfifo_is_empty(&radio->core->rds_fifo))
1147 err = EPOLLIN | EPOLLRDNORM;
1148 }
1149
1150 return err;
1151 }
1152
1153 static const struct v4l2_file_operations si476x_fops = {
1154 .owner = THIS_MODULE,
1155 .read = si476x_radio_fops_read,
1156 .poll = si476x_radio_fops_poll,
1157 .unlocked_ioctl = video_ioctl2,
1158 .open = si476x_radio_fops_open,
1159 .release = si476x_radio_fops_release,
1160 };
1161
1162
1163 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1164 .vidioc_querycap = si476x_radio_querycap,
1165 .vidioc_g_tuner = si476x_radio_g_tuner,
1166 .vidioc_s_tuner = si476x_radio_s_tuner,
1167
1168 .vidioc_g_frequency = si476x_radio_g_frequency,
1169 .vidioc_s_frequency = si476x_radio_s_frequency,
1170 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek,
1171 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands,
1172
1173 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1174 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1175
1176 #ifdef CONFIG_VIDEO_ADV_DEBUG
1177 .vidioc_g_register = si476x_radio_g_register,
1178 .vidioc_s_register = si476x_radio_s_register,
1179 #endif
1180 };
1181
1182
1183 static const struct video_device si476x_viddev_template = {
1184 .fops = &si476x_fops,
1185 .name = DRIVER_NAME,
1186 .release = video_device_release_empty,
1187 };
1188
1189
1190
1191 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1192 char __user *user_buf,
1193 size_t count, loff_t *ppos)
1194 {
1195 int err;
1196 struct si476x_radio *radio = file->private_data;
1197 struct si476x_acf_status_report report;
1198
1199 si476x_core_lock(radio->core);
1200 if (radio->ops->acf_status)
1201 err = radio->ops->acf_status(radio->core, &report);
1202 else
1203 err = -ENOENT;
1204 si476x_core_unlock(radio->core);
1205
1206 if (err < 0)
1207 return err;
1208
1209 return simple_read_from_buffer(user_buf, count, ppos, &report,
1210 sizeof(report));
1211 }
1212
1213 static const struct file_operations radio_acf_fops = {
1214 .open = simple_open,
1215 .llseek = default_llseek,
1216 .read = si476x_radio_read_acf_blob,
1217 };
1218
1219 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1220 char __user *user_buf,
1221 size_t count, loff_t *ppos)
1222 {
1223 int err;
1224 struct si476x_radio *radio = file->private_data;
1225 struct si476x_rds_blockcount_report report;
1226
1227 si476x_core_lock(radio->core);
1228 if (radio->ops->rds_blckcnt)
1229 err = radio->ops->rds_blckcnt(radio->core, true,
1230 &report);
1231 else
1232 err = -ENOENT;
1233 si476x_core_unlock(radio->core);
1234
1235 if (err < 0)
1236 return err;
1237
1238 return simple_read_from_buffer(user_buf, count, ppos, &report,
1239 sizeof(report));
1240 }
1241
1242 static const struct file_operations radio_rds_blckcnt_fops = {
1243 .open = simple_open,
1244 .llseek = default_llseek,
1245 .read = si476x_radio_read_rds_blckcnt_blob,
1246 };
1247
1248 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1249 char __user *user_buf,
1250 size_t count, loff_t *ppos)
1251 {
1252 int err;
1253 struct si476x_radio *radio = file->private_data;
1254 struct si476x_agc_status_report report;
1255
1256 si476x_core_lock(radio->core);
1257 if (radio->ops->rds_blckcnt)
1258 err = radio->ops->agc_status(radio->core, &report);
1259 else
1260 err = -ENOENT;
1261 si476x_core_unlock(radio->core);
1262
1263 if (err < 0)
1264 return err;
1265
1266 return simple_read_from_buffer(user_buf, count, ppos, &report,
1267 sizeof(report));
1268 }
1269
1270 static const struct file_operations radio_agc_fops = {
1271 .open = simple_open,
1272 .llseek = default_llseek,
1273 .read = si476x_radio_read_agc_blob,
1274 };
1275
1276 static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1277 char __user *user_buf,
1278 size_t count, loff_t *ppos)
1279 {
1280 int err;
1281 struct si476x_radio *radio = file->private_data;
1282 struct si476x_rsq_status_report report;
1283 struct si476x_rsq_status_args args = {
1284 .primary = false,
1285 .rsqack = false,
1286 .attune = false,
1287 .cancel = false,
1288 .stcack = false,
1289 };
1290
1291 si476x_core_lock(radio->core);
1292 if (radio->ops->rds_blckcnt)
1293 err = radio->ops->rsq_status(radio->core, &args, &report);
1294 else
1295 err = -ENOENT;
1296 si476x_core_unlock(radio->core);
1297
1298 if (err < 0)
1299 return err;
1300
1301 return simple_read_from_buffer(user_buf, count, ppos, &report,
1302 sizeof(report));
1303 }
1304
1305 static const struct file_operations radio_rsq_fops = {
1306 .open = simple_open,
1307 .llseek = default_llseek,
1308 .read = si476x_radio_read_rsq_blob,
1309 };
1310
1311 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1312 char __user *user_buf,
1313 size_t count, loff_t *ppos)
1314 {
1315 int err;
1316 struct si476x_radio *radio = file->private_data;
1317 struct si476x_rsq_status_report report;
1318 struct si476x_rsq_status_args args = {
1319 .primary = true,
1320 .rsqack = false,
1321 .attune = false,
1322 .cancel = false,
1323 .stcack = false,
1324 };
1325
1326 si476x_core_lock(radio->core);
1327 if (radio->ops->rds_blckcnt)
1328 err = radio->ops->rsq_status(radio->core, &args, &report);
1329 else
1330 err = -ENOENT;
1331 si476x_core_unlock(radio->core);
1332
1333 if (err < 0)
1334 return err;
1335
1336 return simple_read_from_buffer(user_buf, count, ppos, &report,
1337 sizeof(report));
1338 }
1339
1340 static const struct file_operations radio_rsq_primary_fops = {
1341 .open = simple_open,
1342 .llseek = default_llseek,
1343 .read = si476x_radio_read_rsq_primary_blob,
1344 };
1345
1346
1347 static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1348 {
1349 struct dentry *dentry;
1350 int ret;
1351
1352 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1353 if (IS_ERR(dentry)) {
1354 ret = PTR_ERR(dentry);
1355 goto exit;
1356 }
1357 radio->debugfs = dentry;
1358
1359 dentry = debugfs_create_file("acf", S_IRUGO,
1360 radio->debugfs, radio, &radio_acf_fops);
1361 if (IS_ERR(dentry)) {
1362 ret = PTR_ERR(dentry);
1363 goto cleanup;
1364 }
1365
1366 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1367 radio->debugfs, radio,
1368 &radio_rds_blckcnt_fops);
1369 if (IS_ERR(dentry)) {
1370 ret = PTR_ERR(dentry);
1371 goto cleanup;
1372 }
1373
1374 dentry = debugfs_create_file("agc", S_IRUGO,
1375 radio->debugfs, radio, &radio_agc_fops);
1376 if (IS_ERR(dentry)) {
1377 ret = PTR_ERR(dentry);
1378 goto cleanup;
1379 }
1380
1381 dentry = debugfs_create_file("rsq", S_IRUGO,
1382 radio->debugfs, radio, &radio_rsq_fops);
1383 if (IS_ERR(dentry)) {
1384 ret = PTR_ERR(dentry);
1385 goto cleanup;
1386 }
1387
1388 dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1389 radio->debugfs, radio,
1390 &radio_rsq_primary_fops);
1391 if (IS_ERR(dentry)) {
1392 ret = PTR_ERR(dentry);
1393 goto cleanup;
1394 }
1395
1396 return 0;
1397 cleanup:
1398 debugfs_remove_recursive(radio->debugfs);
1399 exit:
1400 return ret;
1401 }
1402
1403
1404 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1405 enum si476x_ctrl_idx idx)
1406 {
1407 int rval;
1408 struct v4l2_ctrl *ctrl;
1409
1410 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1411 &si476x_ctrls[idx],
1412 NULL);
1413 rval = radio->ctrl_handler.error;
1414 if (ctrl == NULL && rval)
1415 dev_err(radio->v4l2dev.dev,
1416 "Could not initialize '%s' control %d\n",
1417 si476x_ctrls[idx].name, rval);
1418
1419 return rval;
1420 }
1421
1422 static int si476x_radio_probe(struct platform_device *pdev)
1423 {
1424 int rval;
1425 struct si476x_radio *radio;
1426 struct v4l2_ctrl *ctrl;
1427
1428 static atomic_t instance = ATOMIC_INIT(0);
1429
1430 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1431 if (!radio)
1432 return -ENOMEM;
1433
1434 radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1435
1436 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1437
1438 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1439 if (rval) {
1440 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1441 return rval;
1442 }
1443
1444 memcpy(&radio->videodev, &si476x_viddev_template,
1445 sizeof(struct video_device));
1446
1447 radio->videodev.v4l2_dev = &radio->v4l2dev;
1448 radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1449 radio->videodev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
1450 V4L2_CAP_HW_FREQ_SEEK;
1451
1452 si476x_core_lock(radio->core);
1453 if (!si476x_core_is_a_secondary_tuner(radio->core))
1454 radio->videodev.device_caps |= V4L2_CAP_RDS_CAPTURE |
1455 V4L2_CAP_READWRITE;
1456 si476x_core_unlock(radio->core);
1457
1458 video_set_drvdata(&radio->videodev, radio);
1459 platform_set_drvdata(pdev, radio);
1460
1461
1462 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1463 v4l2_ctrl_handler_init(&radio->ctrl_handler,
1464 1 + ARRAY_SIZE(si476x_ctrls));
1465
1466 if (si476x_core_has_am(radio->core)) {
1467 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1468 &si476x_ctrl_ops,
1469 V4L2_CID_POWER_LINE_FREQUENCY,
1470 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1471 0, 0);
1472 rval = radio->ctrl_handler.error;
1473 if (ctrl == NULL && rval) {
1474 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1475 rval);
1476 goto exit;
1477 }
1478
1479 rval = si476x_radio_add_new_custom(radio,
1480 SI476X_IDX_HARMONICS_COUNT);
1481 if (rval < 0)
1482 goto exit;
1483 }
1484
1485 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1486 if (rval < 0)
1487 goto exit;
1488
1489 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1490 if (rval < 0)
1491 goto exit;
1492
1493 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1494 if (rval < 0)
1495 goto exit;
1496
1497 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1498 &si476x_ctrl_ops,
1499 V4L2_CID_TUNE_DEEMPHASIS,
1500 V4L2_DEEMPHASIS_75_uS, 0, 0);
1501 rval = radio->ctrl_handler.error;
1502 if (ctrl == NULL && rval) {
1503 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1504 rval);
1505 goto exit;
1506 }
1507
1508 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1509 V4L2_CID_RDS_RECEPTION,
1510 0, 1, 1, 1);
1511 rval = radio->ctrl_handler.error;
1512 if (ctrl == NULL && rval) {
1513 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1514 rval);
1515 goto exit;
1516 }
1517
1518 if (si476x_core_has_diversity(radio->core)) {
1519 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1520 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1521 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1522 if (rval < 0)
1523 goto exit;
1524
1525 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1526 if (rval < 0)
1527 goto exit;
1528 }
1529
1530 /* register video device */
1531 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1532 if (rval < 0) {
1533 dev_err(&pdev->dev, "Could not register video device\n");
1534 goto exit;
1535 }
1536
1537 rval = si476x_radio_init_debugfs(radio);
1538 if (rval < 0) {
1539 dev_err(&pdev->dev, "Could not create debugfs interface\n");
1540 goto exit;
1541 }
1542
1543 return 0;
1544 exit:
1545 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1546 return rval;
1547 }
1548
1549 static int si476x_radio_remove(struct platform_device *pdev)
1550 {
1551 struct si476x_radio *radio = platform_get_drvdata(pdev);
1552
1553 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1554 video_unregister_device(&radio->videodev);
1555 v4l2_device_unregister(&radio->v4l2dev);
1556 debugfs_remove_recursive(radio->debugfs);
1557
1558 return 0;
1559 }
1560
1561 MODULE_ALIAS("platform:si476x-radio");
1562
1563 static struct platform_driver si476x_radio_driver = {
1564 .driver = {
1565 .name = DRIVER_NAME,
1566 },
1567 .probe = si476x_radio_probe,
1568 .remove = si476x_radio_remove,
1569 };
1570 module_platform_driver(si476x_radio_driver);
1571
1572 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1573 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1574 MODULE_LICENSE("GPL");
Linux with added FPC-III support