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mei: me: add cannon point device ids
[linux/fpc-iii.git] / drivers / media / radio / radio-si476x.c
blob540ac887a63cdd562213bf377fbf05574fb27143
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 * @v4l2dev: Pointer to V4L2 device created by V4L2 subsystem
300 * @videodev: Pointer to video device created by V4L2 subsystem
301 * @ctrl_handler: V4L2 controls handler
302 * @core: Pointer to underlying core device
303 * @ops: Vtable of functions. See struct si476x_radio_ops for details
304 * @debugfs: pointer to &strucd dentry for debugfs
305 * @audmode: audio mode, as defined for the rxsubchans field
306 * at videodev2.h
307 *
308 * core structure is the radio device is being used
309 */
310 struct si476x_radio {
311 struct v4l2_device v4l2dev;
312 struct video_device videodev;
313 struct v4l2_ctrl_handler ctrl_handler;
314
315 struct si476x_core *core;
316 /* This field should not be accesses unless core lock is held */
317 const struct si476x_radio_ops *ops;
318
319 struct dentry *debugfs;
320 u32 audmode;
321 };
322
323 static inline struct si476x_radio *
324 v4l2_dev_to_radio(struct v4l2_device *d)
325 {
326 return container_of(d, struct si476x_radio, v4l2dev);
327 }
328
329 static inline struct si476x_radio *
330 v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d)
331 {
332 return container_of(d, struct si476x_radio, ctrl_handler);
333 }
334
335 /*
336 * si476x_vidioc_querycap - query device capabilities
337 */
338 static int si476x_radio_querycap(struct file *file, void *priv,
339 struct v4l2_capability *capability)
340 {
341 struct si476x_radio *radio = video_drvdata(file);
342
343 strlcpy(capability->driver, radio->v4l2dev.name,
344 sizeof(capability->driver));
345 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
346 snprintf(capability->bus_info, sizeof(capability->bus_info),
347 "platform:%s", radio->v4l2dev.name);
348
349 capability->device_caps = V4L2_CAP_TUNER
350 | V4L2_CAP_RADIO
351 | V4L2_CAP_HW_FREQ_SEEK;
352
353 si476x_core_lock(radio->core);
354 if (!si476x_core_is_a_secondary_tuner(radio->core))
355 capability->device_caps |= V4L2_CAP_RDS_CAPTURE
356 | V4L2_CAP_READWRITE;
357 si476x_core_unlock(radio->core);
358
359 capability->capabilities = capability->device_caps
360 | V4L2_CAP_DEVICE_CAPS;
361 return 0;
362 }
363
364 static int si476x_radio_enum_freq_bands(struct file *file, void *priv,
365 struct v4l2_frequency_band *band)
366 {
367 int err;
368 struct si476x_radio *radio = video_drvdata(file);
369
370 if (band->tuner != 0)
371 return -EINVAL;
372
373 switch (radio->core->chip_id) {
374 /* AM/FM tuners -- all bands are supported */
375 case SI476X_CHIP_SI4761:
376 case SI476X_CHIP_SI4764:
377 if (band->index < ARRAY_SIZE(si476x_bands)) {
378 *band = si476x_bands[band->index];
379 err = 0;
380 } else {
381 err = -EINVAL;
382 }
383 break;
384 /* FM companion tuner chips -- only FM bands are
385 * supported */
386 case SI476X_CHIP_SI4768:
387 if (band->index == SI476X_BAND_FM) {
388 *band = si476x_bands[band->index];
389 err = 0;
390 } else {
391 err = -EINVAL;
392 }
393 break;
394 default:
395 err = -EINVAL;
396 }
397
398 return err;
399 }
400
401 static int si476x_radio_g_tuner(struct file *file, void *priv,
402 struct v4l2_tuner *tuner)
403 {
404 int err;
405 struct si476x_rsq_status_report report;
406 struct si476x_radio *radio = video_drvdata(file);
407
408 struct si476x_rsq_status_args args = {
409 .primary = false,
410 .rsqack = false,
411 .attune = false,
412 .cancel = false,
413 .stcack = false,
414 };
415
416 if (tuner->index != 0)
417 return -EINVAL;
418
419 tuner->type = V4L2_TUNER_RADIO;
420 tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies
421 * in multiples of
422 * 62.5 Hz */
423 | V4L2_TUNER_CAP_STEREO
424 | V4L2_TUNER_CAP_HWSEEK_BOUNDED
425 | V4L2_TUNER_CAP_HWSEEK_WRAP
426 | V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
427
428 si476x_core_lock(radio->core);
429
430 if (si476x_core_is_a_secondary_tuner(radio->core)) {
431 strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
432 tuner->rxsubchans = 0;
433 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
434 } else if (si476x_core_has_am(radio->core)) {
435 if (si476x_core_is_a_primary_tuner(radio->core))
436 strlcpy(tuner->name, "AM/FM (primary)",
437 sizeof(tuner->name));
438 else
439 strlcpy(tuner->name, "AM/FM", sizeof(tuner->name));
440
441 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO
442 | V4L2_TUNER_SUB_RDS;
443 tuner->capability |= V4L2_TUNER_CAP_RDS
444 | V4L2_TUNER_CAP_RDS_BLOCK_IO
445 | V4L2_TUNER_CAP_FREQ_BANDS;
446
447 tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
448 } else {
449 strlcpy(tuner->name, "FM", sizeof(tuner->name));
450 tuner->rxsubchans = V4L2_TUNER_SUB_RDS;
451 tuner->capability |= V4L2_TUNER_CAP_RDS
452 | V4L2_TUNER_CAP_RDS_BLOCK_IO
453 | V4L2_TUNER_CAP_FREQ_BANDS;
454 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
455 }
456
457 tuner->audmode = radio->audmode;
458
459 tuner->afc = 1;
460 tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
461
462 err = radio->ops->rsq_status(radio->core,
463 &args, &report);
464 if (err < 0) {
465 tuner->signal = 0;
466 } else {
467 /*
468 * tuner->signal value range: 0x0000 .. 0xFFFF,
469 * report.rssi: -128 .. 127
470 */
471 tuner->signal = (report.rssi + 128) * 257;
472 }
473 si476x_core_unlock(radio->core);
474
475 return err;
476 }
477
478 static int si476x_radio_s_tuner(struct file *file, void *priv,
479 const struct v4l2_tuner *tuner)
480 {
481 struct si476x_radio *radio = video_drvdata(file);
482
483 if (tuner->index != 0)
484 return -EINVAL;
485
486 if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
487 tuner->audmode == V4L2_TUNER_MODE_STEREO)
488 radio->audmode = tuner->audmode;
489 else
490 radio->audmode = V4L2_TUNER_MODE_STEREO;
491
492 return 0;
493 }
494
495 static int si476x_radio_init_vtable(struct si476x_radio *radio,
496 enum si476x_func func)
497 {
498 static const struct si476x_radio_ops fm_ops = {
499 .tune_freq = si476x_core_cmd_fm_tune_freq,
500 .seek_start = si476x_core_cmd_fm_seek_start,
501 .rsq_status = si476x_core_cmd_fm_rsq_status,
502 .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount,
503 .phase_diversity = si476x_core_cmd_fm_phase_diversity,
504 .phase_div_status = si476x_core_cmd_fm_phase_div_status,
505 .acf_status = si476x_core_cmd_fm_acf_status,
506 .agc_status = si476x_core_cmd_agc_status,
507 };
508
509 static const struct si476x_radio_ops am_ops = {
510 .tune_freq = si476x_core_cmd_am_tune_freq,
511 .seek_start = si476x_core_cmd_am_seek_start,
512 .rsq_status = si476x_core_cmd_am_rsq_status,
513 .rds_blckcnt = NULL,
514 .phase_diversity = NULL,
515 .phase_div_status = NULL,
516 .acf_status = si476x_core_cmd_am_acf_status,
517 .agc_status = NULL,
518 };
519
520 switch (func) {
521 case SI476X_FUNC_FM_RECEIVER:
522 radio->ops = &fm_ops;
523 return 0;
524
525 case SI476X_FUNC_AM_RECEIVER:
526 radio->ops = &am_ops;
527 return 0;
528 default:
529 WARN(1, "Unexpected tuner function value\n");
530 return -EINVAL;
531 }
532 }
533
534 static int si476x_radio_pretune(struct si476x_radio *radio,
535 enum si476x_func func)
536 {
537 int retval;
538
539 struct si476x_tune_freq_args args = {
540 .zifsr = false,
541 .hd = false,
542 .injside = SI476X_INJSIDE_AUTO,
543 .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE,
544 .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO,
545 .antcap = 0,
546 };
547
548 switch (func) {
549 case SI476X_FUNC_FM_RECEIVER:
550 args.freq = v4l2_to_si476x(radio->core,
551 92 * FREQ_MUL);
552 retval = radio->ops->tune_freq(radio->core, &args);
553 break;
554 case SI476X_FUNC_AM_RECEIVER:
555 args.freq = v4l2_to_si476x(radio->core,
556 0.6 * FREQ_MUL);
557 retval = radio->ops->tune_freq(radio->core, &args);
558 break;
559 default:
560 WARN(1, "Unexpected tuner function value\n");
561 retval = -EINVAL;
562 }
563
564 return retval;
565 }
566 static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
567 enum si476x_func func)
568 {
569 int err;
570
571 /* regcache_mark_dirty(radio->core->regmap); */
572 err = regcache_sync_region(radio->core->regmap,
573 SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
574 SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
575 if (err < 0)
576 return err;
577
578 err = regcache_sync_region(radio->core->regmap,
579 SI476X_PROP_AUDIO_DEEMPHASIS,
580 SI476X_PROP_AUDIO_PWR_LINE_FILTER);
581 if (err < 0)
582 return err;
583
584 err = regcache_sync_region(radio->core->regmap,
585 SI476X_PROP_INT_CTL_ENABLE,
586 SI476X_PROP_INT_CTL_ENABLE);
587 if (err < 0)
588 return err;
589
590 /*
591 * Is there any point in restoring SNR and the like
592 * when switching between AM/FM?
593 */
594 err = regcache_sync_region(radio->core->regmap,
595 SI476X_PROP_VALID_MAX_TUNE_ERROR,
596 SI476X_PROP_VALID_MAX_TUNE_ERROR);
597 if (err < 0)
598 return err;
599
600 err = regcache_sync_region(radio->core->regmap,
601 SI476X_PROP_VALID_SNR_THRESHOLD,
602 SI476X_PROP_VALID_RSSI_THRESHOLD);
603 if (err < 0)
604 return err;
605
606 if (func == SI476X_FUNC_FM_RECEIVER) {
607 if (si476x_core_has_diversity(radio->core)) {
608 err = si476x_core_cmd_fm_phase_diversity(radio->core,
609 radio->core->diversity_mode);
610 if (err < 0)
611 return err;
612 }
613
614 err = regcache_sync_region(radio->core->regmap,
615 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
616 SI476X_PROP_FM_RDS_CONFIG);
617 if (err < 0)
618 return err;
619 }
620
621 return si476x_radio_init_vtable(radio, func);
622
623 }
624
625 static int si476x_radio_change_func(struct si476x_radio *radio,
626 enum si476x_func func)
627 {
628 int err;
629 bool soft;
630 /*
631 * Since power/up down is a very time consuming operation,
632 * try to avoid doing it if the requested mode matches the one
633 * the tuner is in
634 */
635 if (func == radio->core->power_up_parameters.func)
636 return 0;
637
638 soft = true;
639 err = si476x_core_stop(radio->core, soft);
640 if (err < 0) {
641 /*
642 * OK, if the chip does not want to play nice let's
643 * try to reset it in more brutal way
644 */
645 soft = false;
646 err = si476x_core_stop(radio->core, soft);
647 if (err < 0)
648 return err;
649 }
650 /*
651 Set the desired radio tuner function
652 */
653 radio->core->power_up_parameters.func = func;
654
655 err = si476x_core_start(radio->core, soft);
656 if (err < 0)
657 return err;
658
659 /*
660 * No need to do the rest of manipulations for the bootlader
661 * mode
662 */
663 if (func != SI476X_FUNC_FM_RECEIVER &&
664 func != SI476X_FUNC_AM_RECEIVER)
665 return err;
666
667 return si476x_radio_do_post_powerup_init(radio, func);
668 }
669
670 static int si476x_radio_g_frequency(struct file *file, void *priv,
671 struct v4l2_frequency *f)
672 {
673 int err;
674 struct si476x_radio *radio = video_drvdata(file);
675
676 if (f->tuner != 0 ||
677 f->type != V4L2_TUNER_RADIO)
678 return -EINVAL;
679
680 si476x_core_lock(radio->core);
681
682 if (radio->ops->rsq_status) {
683 struct si476x_rsq_status_report report;
684 struct si476x_rsq_status_args args = {
685 .primary = false,
686 .rsqack = false,
687 .attune = true,
688 .cancel = false,
689 .stcack = false,
690 };
691
692 err = radio->ops->rsq_status(radio->core, &args, &report);
693 if (!err)
694 f->frequency = si476x_to_v4l2(radio->core,
695 report.readfreq);
696 } else {
697 err = -EINVAL;
698 }
699
700 si476x_core_unlock(radio->core);
701
702 return err;
703 }
704
705 static int si476x_radio_s_frequency(struct file *file, void *priv,
706 const struct v4l2_frequency *f)
707 {
708 int err;
709 u32 freq = f->frequency;
710 struct si476x_tune_freq_args args;
711 struct si476x_radio *radio = video_drvdata(file);
712
713 const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
714 si476x_bands[SI476X_BAND_FM].rangelow) / 2;
715 const int band = (freq > midrange) ?
716 SI476X_BAND_FM : SI476X_BAND_AM;
717 const enum si476x_func func = (band == SI476X_BAND_AM) ?
718 SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
719
720 if (f->tuner != 0 ||
721 f->type != V4L2_TUNER_RADIO)
722 return -EINVAL;
723
724 si476x_core_lock(radio->core);
725
726 freq = clamp(freq,
727 si476x_bands[band].rangelow,
728 si476x_bands[band].rangehigh);
729
730 if (si476x_radio_freq_is_inside_of_the_band(freq,
731 SI476X_BAND_AM) &&
732 (!si476x_core_has_am(radio->core) ||
733 si476x_core_is_a_secondary_tuner(radio->core))) {
734 err = -EINVAL;
735 goto unlock;
736 }
737
738 err = si476x_radio_change_func(radio, func);
739 if (err < 0)
740 goto unlock;
741
742 args.zifsr = false;
743 args.hd = false;
744 args.injside = SI476X_INJSIDE_AUTO;
745 args.freq = v4l2_to_si476x(radio->core, freq);
746 args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE;
747 args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO;
748 args.antcap = 0;
749
750 err = radio->ops->tune_freq(radio->core, &args);
751
752 unlock:
753 si476x_core_unlock(radio->core);
754 return err;
755 }
756
757 static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
758 const struct v4l2_hw_freq_seek *seek)
759 {
760 int err;
761 enum si476x_func func;
762 u32 rangelow, rangehigh;
763 struct si476x_radio *radio = video_drvdata(file);
764
765 if (file->f_flags & O_NONBLOCK)
766 return -EAGAIN;
767
768 if (seek->tuner != 0 ||
769 seek->type != V4L2_TUNER_RADIO)
770 return -EINVAL;
771
772 si476x_core_lock(radio->core);
773
774 if (!seek->rangelow) {
775 err = regmap_read(radio->core->regmap,
776 SI476X_PROP_SEEK_BAND_BOTTOM,
777 &rangelow);
778 if (!err)
779 rangelow = si476x_to_v4l2(radio->core, rangelow);
780 else
781 goto unlock;
782 }
783 if (!seek->rangehigh) {
784 err = regmap_read(radio->core->regmap,
785 SI476X_PROP_SEEK_BAND_TOP,
786 &rangehigh);
787 if (!err)
788 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
789 else
790 goto unlock;
791 }
792
793 if (rangelow > rangehigh) {
794 err = -EINVAL;
795 goto unlock;
796 }
797
798 if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
799 SI476X_BAND_FM)) {
800 func = SI476X_FUNC_FM_RECEIVER;
801
802 } else if (si476x_core_has_am(radio->core) &&
803 si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
804 SI476X_BAND_AM)) {
805 func = SI476X_FUNC_AM_RECEIVER;
806 } else {
807 err = -EINVAL;
808 goto unlock;
809 }
810
811 err = si476x_radio_change_func(radio, func);
812 if (err < 0)
813 goto unlock;
814
815 if (seek->rangehigh) {
816 err = regmap_write(radio->core->regmap,
817 SI476X_PROP_SEEK_BAND_TOP,
818 v4l2_to_si476x(radio->core,
819 seek->rangehigh));
820 if (err)
821 goto unlock;
822 }
823 if (seek->rangelow) {
824 err = regmap_write(radio->core->regmap,
825 SI476X_PROP_SEEK_BAND_BOTTOM,
826 v4l2_to_si476x(radio->core,
827 seek->rangelow));
828 if (err)
829 goto unlock;
830 }
831 if (seek->spacing) {
832 err = regmap_write(radio->core->regmap,
833 SI476X_PROP_SEEK_FREQUENCY_SPACING,
834 v4l2_to_si476x(radio->core,
835 seek->spacing));
836 if (err)
837 goto unlock;
838 }
839
840 err = radio->ops->seek_start(radio->core,
841 seek->seek_upward,
842 seek->wrap_around);
843 unlock:
844 si476x_core_unlock(radio->core);
845
846
847
848 return err;
849 }
850
851 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
852 {
853 int retval;
854 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
855
856 si476x_core_lock(radio->core);
857
858 switch (ctrl->id) {
859 case V4L2_CID_SI476X_INTERCHIP_LINK:
860 if (si476x_core_has_diversity(radio->core)) {
861 if (radio->ops->phase_diversity) {
862 retval = radio->ops->phase_div_status(radio->core);
863 if (retval < 0)
864 break;
865
866 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
867 retval = 0;
868 break;
869 } else {
870 retval = -ENOTTY;
871 break;
872 }
873 }
874 retval = -EINVAL;
875 break;
876 default:
877 retval = -EINVAL;
878 break;
879 }
880 si476x_core_unlock(radio->core);
881 return retval;
882
883 }
884
885 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
886 {
887 int retval;
888 enum si476x_phase_diversity_mode mode;
889 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
890
891 si476x_core_lock(radio->core);
892
893 switch (ctrl->id) {
894 case V4L2_CID_SI476X_HARMONICS_COUNT:
895 retval = regmap_update_bits(radio->core->regmap,
896 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
897 SI476X_PROP_PWR_HARMONICS_MASK,
898 ctrl->val);
899 break;
900 case V4L2_CID_POWER_LINE_FREQUENCY:
901 switch (ctrl->val) {
902 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
903 retval = regmap_update_bits(radio->core->regmap,
904 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
905 SI476X_PROP_PWR_ENABLE_MASK,
906 0);
907 break;
908 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
909 retval = regmap_update_bits(radio->core->regmap,
910 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
911 SI476X_PROP_PWR_GRID_MASK,
912 SI476X_PROP_PWR_GRID_50HZ);
913 break;
914 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
915 retval = regmap_update_bits(radio->core->regmap,
916 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
917 SI476X_PROP_PWR_GRID_MASK,
918 SI476X_PROP_PWR_GRID_60HZ);
919 break;
920 default:
921 retval = -EINVAL;
922 break;
923 }
924 break;
925 case V4L2_CID_SI476X_RSSI_THRESHOLD:
926 retval = regmap_write(radio->core->regmap,
927 SI476X_PROP_VALID_RSSI_THRESHOLD,
928 ctrl->val);
929 break;
930 case V4L2_CID_SI476X_SNR_THRESHOLD:
931 retval = regmap_write(radio->core->regmap,
932 SI476X_PROP_VALID_SNR_THRESHOLD,
933 ctrl->val);
934 break;
935 case V4L2_CID_SI476X_MAX_TUNE_ERROR:
936 retval = regmap_write(radio->core->regmap,
937 SI476X_PROP_VALID_MAX_TUNE_ERROR,
938 ctrl->val);
939 break;
940 case V4L2_CID_RDS_RECEPTION:
941 /*
942 * It looks like RDS related properties are
943 * inaccesable when tuner is in AM mode, so cache the
944 * changes
945 */
946 if (si476x_core_is_in_am_receiver_mode(radio->core))
947 regcache_cache_only(radio->core->regmap, true);
948
949 if (ctrl->val) {
950 retval = regmap_write(radio->core->regmap,
951 SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
952 radio->core->rds_fifo_depth);
953 if (retval < 0)
954 break;
955
956 if (radio->core->client->irq) {
957 retval = regmap_write(radio->core->regmap,
958 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
959 SI476X_RDSRECV);
960 if (retval < 0)
961 break;
962 }
963
964 /* Drain RDS FIFO before enabling RDS processing */
965 retval = si476x_core_cmd_fm_rds_status(radio->core,
966 false,
967 true,
968 true,
969 NULL);
970 if (retval < 0)
971 break;
972
973 retval = regmap_update_bits(radio->core->regmap,
974 SI476X_PROP_FM_RDS_CONFIG,
975 SI476X_PROP_RDSEN_MASK,
976 SI476X_PROP_RDSEN);
977 } else {
978 retval = regmap_update_bits(radio->core->regmap,
979 SI476X_PROP_FM_RDS_CONFIG,
980 SI476X_PROP_RDSEN_MASK,
981 !SI476X_PROP_RDSEN);
982 }
983
984 if (si476x_core_is_in_am_receiver_mode(radio->core))
985 regcache_cache_only(radio->core->regmap, false);
986 break;
987 case V4L2_CID_TUNE_DEEMPHASIS:
988 retval = regmap_write(radio->core->regmap,
989 SI476X_PROP_AUDIO_DEEMPHASIS,
990 ctrl->val);
991 break;
992
993 case V4L2_CID_SI476X_DIVERSITY_MODE:
994 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
995
996 if (mode == radio->core->diversity_mode) {
997 retval = 0;
998 break;
999 }
1000
1001 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
1002 /*
1003 * Diversity cannot be configured while tuner
1004 * is in AM mode so save the changes and carry on.
1005 */
1006 radio->core->diversity_mode = mode;
1007 retval = 0;
1008 } else {
1009 retval = radio->ops->phase_diversity(radio->core, mode);
1010 if (!retval)
1011 radio->core->diversity_mode = mode;
1012 }
1013 break;
1014
1015 default:
1016 retval = -EINVAL;
1017 break;
1018 }
1019
1020 si476x_core_unlock(radio->core);
1021
1022 return retval;
1023 }
1024
1025 #ifdef CONFIG_VIDEO_ADV_DEBUG
1026 static int si476x_radio_g_register(struct file *file, void *fh,
1027 struct v4l2_dbg_register *reg)
1028 {
1029 int err;
1030 unsigned int value;
1031 struct si476x_radio *radio = video_drvdata(file);
1032
1033 si476x_core_lock(radio->core);
1034 reg->size = 2;
1035 err = regmap_read(radio->core->regmap,
1036 (unsigned int)reg->reg, &value);
1037 reg->val = value;
1038 si476x_core_unlock(radio->core);
1039
1040 return err;
1041 }
1042 static int si476x_radio_s_register(struct file *file, void *fh,
1043 const struct v4l2_dbg_register *reg)
1044 {
1045
1046 int err;
1047 struct si476x_radio *radio = video_drvdata(file);
1048
1049 si476x_core_lock(radio->core);
1050 err = regmap_write(radio->core->regmap,
1051 (unsigned int)reg->reg,
1052 (unsigned int)reg->val);
1053 si476x_core_unlock(radio->core);
1054
1055 return err;
1056 }
1057 #endif
1058
1059 static int si476x_radio_fops_open(struct file *file)
1060 {
1061 struct si476x_radio *radio = video_drvdata(file);
1062 int err;
1063
1064 err = v4l2_fh_open(file);
1065 if (err)
1066 return err;
1067
1068 if (v4l2_fh_is_singular_file(file)) {
1069 si476x_core_lock(radio->core);
1070 err = si476x_core_set_power_state(radio->core,
1071 SI476X_POWER_UP_FULL);
1072 if (err < 0)
1073 goto done;
1074
1075 err = si476x_radio_do_post_powerup_init(radio,
1076 radio->core->power_up_parameters.func);
1077 if (err < 0)
1078 goto power_down;
1079
1080 err = si476x_radio_pretune(radio,
1081 radio->core->power_up_parameters.func);
1082 if (err < 0)
1083 goto power_down;
1084
1085 si476x_core_unlock(radio->core);
1086 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1087 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1088 }
1089
1090 return err;
1091
1092 power_down:
1093 si476x_core_set_power_state(radio->core,
1094 SI476X_POWER_DOWN);
1095 done:
1096 si476x_core_unlock(radio->core);
1097 v4l2_fh_release(file);
1098
1099 return err;
1100 }
1101
1102 static int si476x_radio_fops_release(struct file *file)
1103 {
1104 int err;
1105 struct si476x_radio *radio = video_drvdata(file);
1106
1107 if (v4l2_fh_is_singular_file(file) &&
1108 atomic_read(&radio->core->is_alive))
1109 si476x_core_set_power_state(radio->core,
1110 SI476X_POWER_DOWN);
1111
1112 err = v4l2_fh_release(file);
1113
1114 return err;
1115 }
1116
1117 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1118 size_t count, loff_t *ppos)
1119 {
1120 ssize_t rval;
1121 size_t fifo_len;
1122 unsigned int copied;
1123
1124 struct si476x_radio *radio = video_drvdata(file);
1125
1126 /* block if no new data available */
1127 if (kfifo_is_empty(&radio->core->rds_fifo)) {
1128 if (file->f_flags & O_NONBLOCK)
1129 return -EWOULDBLOCK;
1130
1131 rval = wait_event_interruptible(radio->core->rds_read_queue,
1132 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1133 !atomic_read(&radio->core->is_alive)));
1134 if (rval < 0)
1135 return -EINTR;
1136
1137 if (!atomic_read(&radio->core->is_alive))
1138 return -ENODEV;
1139 }
1140
1141 fifo_len = kfifo_len(&radio->core->rds_fifo);
1142
1143 if (kfifo_to_user(&radio->core->rds_fifo, buf,
1144 min(fifo_len, count),
1145 &copied) != 0) {
1146 dev_warn(&radio->videodev.dev,
1147 "Error during FIFO to userspace copy\n");
1148 rval = -EIO;
1149 } else {
1150 rval = (ssize_t)copied;
1151 }
1152
1153 return rval;
1154 }
1155
1156 static unsigned int si476x_radio_fops_poll(struct file *file,
1157 struct poll_table_struct *pts)
1158 {
1159 struct si476x_radio *radio = video_drvdata(file);
1160 unsigned long req_events = poll_requested_events(pts);
1161 unsigned int err = v4l2_ctrl_poll(file, pts);
1162
1163 if (req_events & (POLLIN | POLLRDNORM)) {
1164 if (atomic_read(&radio->core->is_alive))
1165 poll_wait(file, &radio->core->rds_read_queue, pts);
1166
1167 if (!atomic_read(&radio->core->is_alive))
1168 err = POLLHUP;
1169
1170 if (!kfifo_is_empty(&radio->core->rds_fifo))
1171 err = POLLIN | POLLRDNORM;
1172 }
1173
1174 return err;
1175 }
1176
1177 static const struct v4l2_file_operations si476x_fops = {
1178 .owner = THIS_MODULE,
1179 .read = si476x_radio_fops_read,
1180 .poll = si476x_radio_fops_poll,
1181 .unlocked_ioctl = video_ioctl2,
1182 .open = si476x_radio_fops_open,
1183 .release = si476x_radio_fops_release,
1184 };
1185
1186
1187 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1188 .vidioc_querycap = si476x_radio_querycap,
1189 .vidioc_g_tuner = si476x_radio_g_tuner,
1190 .vidioc_s_tuner = si476x_radio_s_tuner,
1191
1192 .vidioc_g_frequency = si476x_radio_g_frequency,
1193 .vidioc_s_frequency = si476x_radio_s_frequency,
1194 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek,
1195 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands,
1196
1197 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1198 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1199
1200 #ifdef CONFIG_VIDEO_ADV_DEBUG
1201 .vidioc_g_register = si476x_radio_g_register,
1202 .vidioc_s_register = si476x_radio_s_register,
1203 #endif
1204 };
1205
1206
1207 static const struct video_device si476x_viddev_template = {
1208 .fops = &si476x_fops,
1209 .name = DRIVER_NAME,
1210 .release = video_device_release_empty,
1211 };
1212
1213
1214
1215 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1216 char __user *user_buf,
1217 size_t count, loff_t *ppos)
1218 {
1219 int err;
1220 struct si476x_radio *radio = file->private_data;
1221 struct si476x_acf_status_report report;
1222
1223 si476x_core_lock(radio->core);
1224 if (radio->ops->acf_status)
1225 err = radio->ops->acf_status(radio->core, &report);
1226 else
1227 err = -ENOENT;
1228 si476x_core_unlock(radio->core);
1229
1230 if (err < 0)
1231 return err;
1232
1233 return simple_read_from_buffer(user_buf, count, ppos, &report,
1234 sizeof(report));
1235 }
1236
1237 static const struct file_operations radio_acf_fops = {
1238 .open = simple_open,
1239 .llseek = default_llseek,
1240 .read = si476x_radio_read_acf_blob,
1241 };
1242
1243 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1244 char __user *user_buf,
1245 size_t count, loff_t *ppos)
1246 {
1247 int err;
1248 struct si476x_radio *radio = file->private_data;
1249 struct si476x_rds_blockcount_report report;
1250
1251 si476x_core_lock(radio->core);
1252 if (radio->ops->rds_blckcnt)
1253 err = radio->ops->rds_blckcnt(radio->core, true,
1254 &report);
1255 else
1256 err = -ENOENT;
1257 si476x_core_unlock(radio->core);
1258
1259 if (err < 0)
1260 return err;
1261
1262 return simple_read_from_buffer(user_buf, count, ppos, &report,
1263 sizeof(report));
1264 }
1265
1266 static const struct file_operations radio_rds_blckcnt_fops = {
1267 .open = simple_open,
1268 .llseek = default_llseek,
1269 .read = si476x_radio_read_rds_blckcnt_blob,
1270 };
1271
1272 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1273 char __user *user_buf,
1274 size_t count, loff_t *ppos)
1275 {
1276 int err;
1277 struct si476x_radio *radio = file->private_data;
1278 struct si476x_agc_status_report report;
1279
1280 si476x_core_lock(radio->core);
1281 if (radio->ops->rds_blckcnt)
1282 err = radio->ops->agc_status(radio->core, &report);
1283 else
1284 err = -ENOENT;
1285 si476x_core_unlock(radio->core);
1286
1287 if (err < 0)
1288 return err;
1289
1290 return simple_read_from_buffer(user_buf, count, ppos, &report,
1291 sizeof(report));
1292 }
1293
1294 static const struct file_operations radio_agc_fops = {
1295 .open = simple_open,
1296 .llseek = default_llseek,
1297 .read = si476x_radio_read_agc_blob,
1298 };
1299
1300 static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1301 char __user *user_buf,
1302 size_t count, loff_t *ppos)
1303 {
1304 int err;
1305 struct si476x_radio *radio = file->private_data;
1306 struct si476x_rsq_status_report report;
1307 struct si476x_rsq_status_args args = {
1308 .primary = false,
1309 .rsqack = false,
1310 .attune = false,
1311 .cancel = false,
1312 .stcack = false,
1313 };
1314
1315 si476x_core_lock(radio->core);
1316 if (radio->ops->rds_blckcnt)
1317 err = radio->ops->rsq_status(radio->core, &args, &report);
1318 else
1319 err = -ENOENT;
1320 si476x_core_unlock(radio->core);
1321
1322 if (err < 0)
1323 return err;
1324
1325 return simple_read_from_buffer(user_buf, count, ppos, &report,
1326 sizeof(report));
1327 }
1328
1329 static const struct file_operations radio_rsq_fops = {
1330 .open = simple_open,
1331 .llseek = default_llseek,
1332 .read = si476x_radio_read_rsq_blob,
1333 };
1334
1335 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1336 char __user *user_buf,
1337 size_t count, loff_t *ppos)
1338 {
1339 int err;
1340 struct si476x_radio *radio = file->private_data;
1341 struct si476x_rsq_status_report report;
1342 struct si476x_rsq_status_args args = {
1343 .primary = true,
1344 .rsqack = false,
1345 .attune = false,
1346 .cancel = false,
1347 .stcack = false,
1348 };
1349
1350 si476x_core_lock(radio->core);
1351 if (radio->ops->rds_blckcnt)
1352 err = radio->ops->rsq_status(radio->core, &args, &report);
1353 else
1354 err = -ENOENT;
1355 si476x_core_unlock(radio->core);
1356
1357 if (err < 0)
1358 return err;
1359
1360 return simple_read_from_buffer(user_buf, count, ppos, &report,
1361 sizeof(report));
1362 }
1363
1364 static const struct file_operations radio_rsq_primary_fops = {
1365 .open = simple_open,
1366 .llseek = default_llseek,
1367 .read = si476x_radio_read_rsq_primary_blob,
1368 };
1369
1370
1371 static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1372 {
1373 struct dentry *dentry;
1374 int ret;
1375
1376 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1377 if (IS_ERR(dentry)) {
1378 ret = PTR_ERR(dentry);
1379 goto exit;
1380 }
1381 radio->debugfs = dentry;
1382
1383 dentry = debugfs_create_file("acf", S_IRUGO,
1384 radio->debugfs, radio, &radio_acf_fops);
1385 if (IS_ERR(dentry)) {
1386 ret = PTR_ERR(dentry);
1387 goto cleanup;
1388 }
1389
1390 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1391 radio->debugfs, radio,
1392 &radio_rds_blckcnt_fops);
1393 if (IS_ERR(dentry)) {
1394 ret = PTR_ERR(dentry);
1395 goto cleanup;
1396 }
1397
1398 dentry = debugfs_create_file("agc", S_IRUGO,
1399 radio->debugfs, radio, &radio_agc_fops);
1400 if (IS_ERR(dentry)) {
1401 ret = PTR_ERR(dentry);
1402 goto cleanup;
1403 }
1404
1405 dentry = debugfs_create_file("rsq", S_IRUGO,
1406 radio->debugfs, radio, &radio_rsq_fops);
1407 if (IS_ERR(dentry)) {
1408 ret = PTR_ERR(dentry);
1409 goto cleanup;
1410 }
1411
1412 dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1413 radio->debugfs, radio,
1414 &radio_rsq_primary_fops);
1415 if (IS_ERR(dentry)) {
1416 ret = PTR_ERR(dentry);
1417 goto cleanup;
1418 }
1419
1420 return 0;
1421 cleanup:
1422 debugfs_remove_recursive(radio->debugfs);
1423 exit:
1424 return ret;
1425 }
1426
1427
1428 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1429 enum si476x_ctrl_idx idx)
1430 {
1431 int rval;
1432 struct v4l2_ctrl *ctrl;
1433
1434 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1435 &si476x_ctrls[idx],
1436 NULL);
1437 rval = radio->ctrl_handler.error;
1438 if (ctrl == NULL && rval)
1439 dev_err(radio->v4l2dev.dev,
1440 "Could not initialize '%s' control %d\n",
1441 si476x_ctrls[idx].name, rval);
1442
1443 return rval;
1444 }
1445
1446 static int si476x_radio_probe(struct platform_device *pdev)
1447 {
1448 int rval;
1449 struct si476x_radio *radio;
1450 struct v4l2_ctrl *ctrl;
1451
1452 static atomic_t instance = ATOMIC_INIT(0);
1453
1454 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1455 if (!radio)
1456 return -ENOMEM;
1457
1458 radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1459
1460 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1461
1462 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1463 if (rval) {
1464 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1465 return rval;
1466 }
1467
1468 memcpy(&radio->videodev, &si476x_viddev_template,
1469 sizeof(struct video_device));
1470
1471 radio->videodev.v4l2_dev = &radio->v4l2dev;
1472 radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1473
1474 video_set_drvdata(&radio->videodev, radio);
1475 platform_set_drvdata(pdev, radio);
1476
1477
1478 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1479 v4l2_ctrl_handler_init(&radio->ctrl_handler,
1480 1 + ARRAY_SIZE(si476x_ctrls));
1481
1482 if (si476x_core_has_am(radio->core)) {
1483 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1484 &si476x_ctrl_ops,
1485 V4L2_CID_POWER_LINE_FREQUENCY,
1486 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1487 0, 0);
1488 rval = radio->ctrl_handler.error;
1489 if (ctrl == NULL && rval) {
1490 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1491 rval);
1492 goto exit;
1493 }
1494
1495 rval = si476x_radio_add_new_custom(radio,
1496 SI476X_IDX_HARMONICS_COUNT);
1497 if (rval < 0)
1498 goto exit;
1499 }
1500
1501 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1502 if (rval < 0)
1503 goto exit;
1504
1505 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1506 if (rval < 0)
1507 goto exit;
1508
1509 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1510 if (rval < 0)
1511 goto exit;
1512
1513 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1514 &si476x_ctrl_ops,
1515 V4L2_CID_TUNE_DEEMPHASIS,
1516 V4L2_DEEMPHASIS_75_uS, 0, 0);
1517 rval = radio->ctrl_handler.error;
1518 if (ctrl == NULL && rval) {
1519 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1520 rval);
1521 goto exit;
1522 }
1523
1524 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1525 V4L2_CID_RDS_RECEPTION,
1526 0, 1, 1, 1);
1527 rval = radio->ctrl_handler.error;
1528 if (ctrl == NULL && rval) {
1529 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1530 rval);
1531 goto exit;
1532 }
1533
1534 if (si476x_core_has_diversity(radio->core)) {
1535 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1536 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1537 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1538 if (rval < 0)
1539 goto exit;
1540
1541 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1542 if (rval < 0)
1543 goto exit;
1544 }
1545
1546 /* register video device */
1547 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1548 if (rval < 0) {
1549 dev_err(&pdev->dev, "Could not register video device\n");
1550 goto exit;
1551 }
1552
1553 rval = si476x_radio_init_debugfs(radio);
1554 if (rval < 0) {
1555 dev_err(&pdev->dev, "Could not creat debugfs interface\n");
1556 goto exit;
1557 }
1558
1559 return 0;
1560 exit:
1561 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1562 return rval;
1563 }
1564
1565 static int si476x_radio_remove(struct platform_device *pdev)
1566 {
1567 struct si476x_radio *radio = platform_get_drvdata(pdev);
1568
1569 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1570 video_unregister_device(&radio->videodev);
1571 v4l2_device_unregister(&radio->v4l2dev);
1572 debugfs_remove_recursive(radio->debugfs);
1573
1574 return 0;
1575 }
1576
1577 MODULE_ALIAS("platform:si476x-radio");
1578
1579 static struct platform_driver si476x_radio_driver = {
1580 .driver = {
1581 .name = DRIVER_NAME,
1582 },
1583 .probe = si476x_radio_probe,
1584 .remove = si476x_radio_remove,
1585 };
1586 module_platform_driver(si476x_radio_driver);
1587
1588 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1589 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1590 MODULE_LICENSE("GPL");
Linux with added FPC-III support