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
si476x_radio_freq_is_inside_of_the_band(u32 freq,int band)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
si476x_radio_range_is_inside_of_the_band(u32 low,u32 high,int band)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
si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode)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
si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx)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 *
v4l2_dev_to_radio(struct v4l2_device * d)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 *
v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler * d)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 */
si476x_radio_querycap(struct file * file,void * priv,struct v4l2_capability * capability)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
si476x_radio_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)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
si476x_radio_g_tuner(struct file * file,void * priv,struct v4l2_tuner * tuner)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
si476x_radio_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * tuner)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
si476x_radio_init_vtable(struct si476x_radio * radio,enum si476x_func func)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
si476x_radio_pretune(struct si476x_radio * radio,enum si476x_func func)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 }
si476x_radio_do_post_powerup_init(struct si476x_radio * radio,enum si476x_func func)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
si476x_radio_change_func(struct si476x_radio * radio,enum si476x_func func)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
si476x_radio_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)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
si476x_radio_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)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
si476x_radio_s_hw_freq_seek(struct file * file,void * priv,const struct v4l2_hw_freq_seek * seek)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 = seek->rangelow, rangehigh = seek->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 (!rangelow) {
775 err = regmap_read(radio->core->regmap,
776 SI476X_PROP_SEEK_BAND_BOTTOM,
777 &rangelow);
778 if (err)
779 goto unlock;
780 rangelow = si476x_to_v4l2(radio->core, rangelow);
781 }
782 if (!rangehigh) {
783 err = regmap_read(radio->core->regmap,
784 SI476X_PROP_SEEK_BAND_TOP,
785 &rangehigh);
786 if (err)
787 goto unlock;
788 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
789 }
790
791 if (rangelow > rangehigh) {
792 err = -EINVAL;
793 goto unlock;
794 }
795
796 if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
797 SI476X_BAND_FM)) {
798 func = SI476X_FUNC_FM_RECEIVER;
799
800 } else if (si476x_core_has_am(radio->core) &&
801 si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
802 SI476X_BAND_AM)) {
803 func = SI476X_FUNC_AM_RECEIVER;
804 } else {
805 err = -EINVAL;
806 goto unlock;
807 }
808
809 err = si476x_radio_change_func(radio, func);
810 if (err < 0)
811 goto unlock;
812
813 if (seek->rangehigh) {
814 err = regmap_write(radio->core->regmap,
815 SI476X_PROP_SEEK_BAND_TOP,
816 v4l2_to_si476x(radio->core,
817 seek->rangehigh));
818 if (err)
819 goto unlock;
820 }
821 if (seek->rangelow) {
822 err = regmap_write(radio->core->regmap,
823 SI476X_PROP_SEEK_BAND_BOTTOM,
824 v4l2_to_si476x(radio->core,
825 seek->rangelow));
826 if (err)
827 goto unlock;
828 }
829 if (seek->spacing) {
830 err = regmap_write(radio->core->regmap,
831 SI476X_PROP_SEEK_FREQUENCY_SPACING,
832 v4l2_to_si476x(radio->core,
833 seek->spacing));
834 if (err)
835 goto unlock;
836 }
837
838 err = radio->ops->seek_start(radio->core,
839 seek->seek_upward,
840 seek->wrap_around);
841 unlock:
842 si476x_core_unlock(radio->core);
843
844
845
846 return err;
847 }
848
si476x_radio_g_volatile_ctrl(struct v4l2_ctrl * ctrl)849 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
850 {
851 int retval;
852 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
853
854 si476x_core_lock(radio->core);
855
856 switch (ctrl->id) {
857 case V4L2_CID_SI476X_INTERCHIP_LINK:
858 if (si476x_core_has_diversity(radio->core)) {
859 if (radio->ops->phase_diversity) {
860 retval = radio->ops->phase_div_status(radio->core);
861 if (retval < 0)
862 break;
863
864 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
865 retval = 0;
866 break;
867 } else {
868 retval = -ENOTTY;
869 break;
870 }
871 }
872 retval = -EINVAL;
873 break;
874 default:
875 retval = -EINVAL;
876 break;
877 }
878 si476x_core_unlock(radio->core);
879 return retval;
880
881 }
882
si476x_radio_s_ctrl(struct v4l2_ctrl * ctrl)883 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
884 {
885 int retval;
886 enum si476x_phase_diversity_mode mode;
887 struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
888
889 si476x_core_lock(radio->core);
890
891 switch (ctrl->id) {
892 case V4L2_CID_SI476X_HARMONICS_COUNT:
893 retval = regmap_update_bits(radio->core->regmap,
894 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
895 SI476X_PROP_PWR_HARMONICS_MASK,
896 ctrl->val);
897 break;
898 case V4L2_CID_POWER_LINE_FREQUENCY:
899 switch (ctrl->val) {
900 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
901 retval = regmap_update_bits(radio->core->regmap,
902 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
903 SI476X_PROP_PWR_ENABLE_MASK,
904 0);
905 break;
906 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
907 retval = regmap_update_bits(radio->core->regmap,
908 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
909 SI476X_PROP_PWR_GRID_MASK,
910 SI476X_PROP_PWR_GRID_50HZ);
911 break;
912 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
913 retval = regmap_update_bits(radio->core->regmap,
914 SI476X_PROP_AUDIO_PWR_LINE_FILTER,
915 SI476X_PROP_PWR_GRID_MASK,
916 SI476X_PROP_PWR_GRID_60HZ);
917 break;
918 default:
919 retval = -EINVAL;
920 break;
921 }
922 break;
923 case V4L2_CID_SI476X_RSSI_THRESHOLD:
924 retval = regmap_write(radio->core->regmap,
925 SI476X_PROP_VALID_RSSI_THRESHOLD,
926 ctrl->val);
927 break;
928 case V4L2_CID_SI476X_SNR_THRESHOLD:
929 retval = regmap_write(radio->core->regmap,
930 SI476X_PROP_VALID_SNR_THRESHOLD,
931 ctrl->val);
932 break;
933 case V4L2_CID_SI476X_MAX_TUNE_ERROR:
934 retval = regmap_write(radio->core->regmap,
935 SI476X_PROP_VALID_MAX_TUNE_ERROR,
936 ctrl->val);
937 break;
938 case V4L2_CID_RDS_RECEPTION:
939 /*
940 * It looks like RDS related properties are
941 * inaccesable when tuner is in AM mode, so cache the
942 * changes
943 */
944 if (si476x_core_is_in_am_receiver_mode(radio->core))
945 regcache_cache_only(radio->core->regmap, true);
946
947 if (ctrl->val) {
948 retval = regmap_write(radio->core->regmap,
949 SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
950 radio->core->rds_fifo_depth);
951 if (retval < 0)
952 break;
953
954 if (radio->core->client->irq) {
955 retval = regmap_write(radio->core->regmap,
956 SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
957 SI476X_RDSRECV);
958 if (retval < 0)
959 break;
960 }
961
962 /* Drain RDS FIFO before enabling RDS processing */
963 retval = si476x_core_cmd_fm_rds_status(radio->core,
964 false,
965 true,
966 true,
967 NULL);
968 if (retval < 0)
969 break;
970
971 retval = regmap_update_bits(radio->core->regmap,
972 SI476X_PROP_FM_RDS_CONFIG,
973 SI476X_PROP_RDSEN_MASK,
974 SI476X_PROP_RDSEN);
975 } else {
976 retval = regmap_update_bits(radio->core->regmap,
977 SI476X_PROP_FM_RDS_CONFIG,
978 SI476X_PROP_RDSEN_MASK,
979 !SI476X_PROP_RDSEN);
980 }
981
982 if (si476x_core_is_in_am_receiver_mode(radio->core))
983 regcache_cache_only(radio->core->regmap, false);
984 break;
985 case V4L2_CID_TUNE_DEEMPHASIS:
986 retval = regmap_write(radio->core->regmap,
987 SI476X_PROP_AUDIO_DEEMPHASIS,
988 ctrl->val);
989 break;
990
991 case V4L2_CID_SI476X_DIVERSITY_MODE:
992 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
993
994 if (mode == radio->core->diversity_mode) {
995 retval = 0;
996 break;
997 }
998
999 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
1000 /*
1001 * Diversity cannot be configured while tuner
1002 * is in AM mode so save the changes and carry on.
1003 */
1004 radio->core->diversity_mode = mode;
1005 retval = 0;
1006 } else {
1007 retval = radio->ops->phase_diversity(radio->core, mode);
1008 if (!retval)
1009 radio->core->diversity_mode = mode;
1010 }
1011 break;
1012
1013 default:
1014 retval = -EINVAL;
1015 break;
1016 }
1017
1018 si476x_core_unlock(radio->core);
1019
1020 return retval;
1021 }
1022
1023 #ifdef CONFIG_VIDEO_ADV_DEBUG
si476x_radio_g_register(struct file * file,void * fh,struct v4l2_dbg_register * reg)1024 static int si476x_radio_g_register(struct file *file, void *fh,
1025 struct v4l2_dbg_register *reg)
1026 {
1027 int err;
1028 unsigned int value;
1029 struct si476x_radio *radio = video_drvdata(file);
1030
1031 si476x_core_lock(radio->core);
1032 reg->size = 2;
1033 err = regmap_read(radio->core->regmap,
1034 (unsigned int)reg->reg, &value);
1035 reg->val = value;
1036 si476x_core_unlock(radio->core);
1037
1038 return err;
1039 }
si476x_radio_s_register(struct file * file,void * fh,const struct v4l2_dbg_register * reg)1040 static int si476x_radio_s_register(struct file *file, void *fh,
1041 const struct v4l2_dbg_register *reg)
1042 {
1043
1044 int err;
1045 struct si476x_radio *radio = video_drvdata(file);
1046
1047 si476x_core_lock(radio->core);
1048 err = regmap_write(radio->core->regmap,
1049 (unsigned int)reg->reg,
1050 (unsigned int)reg->val);
1051 si476x_core_unlock(radio->core);
1052
1053 return err;
1054 }
1055 #endif
1056
si476x_radio_fops_open(struct file * file)1057 static int si476x_radio_fops_open(struct file *file)
1058 {
1059 struct si476x_radio *radio = video_drvdata(file);
1060 int err;
1061
1062 err = v4l2_fh_open(file);
1063 if (err)
1064 return err;
1065
1066 if (v4l2_fh_is_singular_file(file)) {
1067 si476x_core_lock(radio->core);
1068 err = si476x_core_set_power_state(radio->core,
1069 SI476X_POWER_UP_FULL);
1070 if (err < 0)
1071 goto done;
1072
1073 err = si476x_radio_do_post_powerup_init(radio,
1074 radio->core->power_up_parameters.func);
1075 if (err < 0)
1076 goto power_down;
1077
1078 err = si476x_radio_pretune(radio,
1079 radio->core->power_up_parameters.func);
1080 if (err < 0)
1081 goto power_down;
1082
1083 si476x_core_unlock(radio->core);
1084 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1085 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1086 }
1087
1088 return err;
1089
1090 power_down:
1091 si476x_core_set_power_state(radio->core,
1092 SI476X_POWER_DOWN);
1093 done:
1094 si476x_core_unlock(radio->core);
1095 v4l2_fh_release(file);
1096
1097 return err;
1098 }
1099
si476x_radio_fops_release(struct file * file)1100 static int si476x_radio_fops_release(struct file *file)
1101 {
1102 int err;
1103 struct si476x_radio *radio = video_drvdata(file);
1104
1105 if (v4l2_fh_is_singular_file(file) &&
1106 atomic_read(&radio->core->is_alive))
1107 si476x_core_set_power_state(radio->core,
1108 SI476X_POWER_DOWN);
1109
1110 err = v4l2_fh_release(file);
1111
1112 return err;
1113 }
1114
si476x_radio_fops_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)1115 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1116 size_t count, loff_t *ppos)
1117 {
1118 ssize_t rval;
1119 size_t fifo_len;
1120 unsigned int copied;
1121
1122 struct si476x_radio *radio = video_drvdata(file);
1123
1124 /* block if no new data available */
1125 if (kfifo_is_empty(&radio->core->rds_fifo)) {
1126 if (file->f_flags & O_NONBLOCK)
1127 return -EWOULDBLOCK;
1128
1129 rval = wait_event_interruptible(radio->core->rds_read_queue,
1130 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1131 !atomic_read(&radio->core->is_alive)));
1132 if (rval < 0)
1133 return -EINTR;
1134
1135 if (!atomic_read(&radio->core->is_alive))
1136 return -ENODEV;
1137 }
1138
1139 fifo_len = kfifo_len(&radio->core->rds_fifo);
1140
1141 if (kfifo_to_user(&radio->core->rds_fifo, buf,
1142 min(fifo_len, count),
1143 &copied) != 0) {
1144 dev_warn(&radio->videodev.dev,
1145 "Error during FIFO to userspace copy\n");
1146 rval = -EIO;
1147 } else {
1148 rval = (ssize_t)copied;
1149 }
1150
1151 return rval;
1152 }
1153
si476x_radio_fops_poll(struct file * file,struct poll_table_struct * pts)1154 static __poll_t si476x_radio_fops_poll(struct file *file,
1155 struct poll_table_struct *pts)
1156 {
1157 struct si476x_radio *radio = video_drvdata(file);
1158 __poll_t req_events = poll_requested_events(pts);
1159 __poll_t err = v4l2_ctrl_poll(file, pts);
1160
1161 if (req_events & (EPOLLIN | EPOLLRDNORM)) {
1162 if (atomic_read(&radio->core->is_alive))
1163 poll_wait(file, &radio->core->rds_read_queue, pts);
1164
1165 if (!atomic_read(&radio->core->is_alive))
1166 err = EPOLLHUP;
1167
1168 if (!kfifo_is_empty(&radio->core->rds_fifo))
1169 err = EPOLLIN | EPOLLRDNORM;
1170 }
1171
1172 return err;
1173 }
1174
1175 static const struct v4l2_file_operations si476x_fops = {
1176 .owner = THIS_MODULE,
1177 .read = si476x_radio_fops_read,
1178 .poll = si476x_radio_fops_poll,
1179 .unlocked_ioctl = video_ioctl2,
1180 .open = si476x_radio_fops_open,
1181 .release = si476x_radio_fops_release,
1182 };
1183
1184
1185 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1186 .vidioc_querycap = si476x_radio_querycap,
1187 .vidioc_g_tuner = si476x_radio_g_tuner,
1188 .vidioc_s_tuner = si476x_radio_s_tuner,
1189
1190 .vidioc_g_frequency = si476x_radio_g_frequency,
1191 .vidioc_s_frequency = si476x_radio_s_frequency,
1192 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek,
1193 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands,
1194
1195 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1196 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1197
1198 #ifdef CONFIG_VIDEO_ADV_DEBUG
1199 .vidioc_g_register = si476x_radio_g_register,
1200 .vidioc_s_register = si476x_radio_s_register,
1201 #endif
1202 };
1203
1204
1205 static const struct video_device si476x_viddev_template = {
1206 .fops = &si476x_fops,
1207 .name = DRIVER_NAME,
1208 .release = video_device_release_empty,
1209 };
1210
1211
1212
si476x_radio_read_acf_blob(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)1213 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1214 char __user *user_buf,
1215 size_t count, loff_t *ppos)
1216 {
1217 int err;
1218 struct si476x_radio *radio = file->private_data;
1219 struct si476x_acf_status_report report;
1220
1221 si476x_core_lock(radio->core);
1222 if (radio->ops->acf_status)
1223 err = radio->ops->acf_status(radio->core, &report);
1224 else
1225 err = -ENOENT;
1226 si476x_core_unlock(radio->core);
1227
1228 if (err < 0)
1229 return err;
1230
1231 return simple_read_from_buffer(user_buf, count, ppos, &report,
1232 sizeof(report));
1233 }
1234
1235 static const struct file_operations radio_acf_fops = {
1236 .open = simple_open,
1237 .llseek = default_llseek,
1238 .read = si476x_radio_read_acf_blob,
1239 };
1240
si476x_radio_read_rds_blckcnt_blob(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)1241 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1242 char __user *user_buf,
1243 size_t count, loff_t *ppos)
1244 {
1245 int err;
1246 struct si476x_radio *radio = file->private_data;
1247 struct si476x_rds_blockcount_report report;
1248
1249 si476x_core_lock(radio->core);
1250 if (radio->ops->rds_blckcnt)
1251 err = radio->ops->rds_blckcnt(radio->core, true,
1252 &report);
1253 else
1254 err = -ENOENT;
1255 si476x_core_unlock(radio->core);
1256
1257 if (err < 0)
1258 return err;
1259
1260 return simple_read_from_buffer(user_buf, count, ppos, &report,
1261 sizeof(report));
1262 }
1263
1264 static const struct file_operations radio_rds_blckcnt_fops = {
1265 .open = simple_open,
1266 .llseek = default_llseek,
1267 .read = si476x_radio_read_rds_blckcnt_blob,
1268 };
1269
si476x_radio_read_agc_blob(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)1270 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1271 char __user *user_buf,
1272 size_t count, loff_t *ppos)
1273 {
1274 int err;
1275 struct si476x_radio *radio = file->private_data;
1276 struct si476x_agc_status_report report;
1277
1278 si476x_core_lock(radio->core);
1279 if (radio->ops->rds_blckcnt)
1280 err = radio->ops->agc_status(radio->core, &report);
1281 else
1282 err = -ENOENT;
1283 si476x_core_unlock(radio->core);
1284
1285 if (err < 0)
1286 return err;
1287
1288 return simple_read_from_buffer(user_buf, count, ppos, &report,
1289 sizeof(report));
1290 }
1291
1292 static const struct file_operations radio_agc_fops = {
1293 .open = simple_open,
1294 .llseek = default_llseek,
1295 .read = si476x_radio_read_agc_blob,
1296 };
1297
si476x_radio_read_rsq_blob(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)1298 static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1299 char __user *user_buf,
1300 size_t count, loff_t *ppos)
1301 {
1302 int err;
1303 struct si476x_radio *radio = file->private_data;
1304 struct si476x_rsq_status_report report;
1305 struct si476x_rsq_status_args args = {
1306 .primary = false,
1307 .rsqack = false,
1308 .attune = false,
1309 .cancel = false,
1310 .stcack = false,
1311 };
1312
1313 si476x_core_lock(radio->core);
1314 if (radio->ops->rds_blckcnt)
1315 err = radio->ops->rsq_status(radio->core, &args, &report);
1316 else
1317 err = -ENOENT;
1318 si476x_core_unlock(radio->core);
1319
1320 if (err < 0)
1321 return err;
1322
1323 return simple_read_from_buffer(user_buf, count, ppos, &report,
1324 sizeof(report));
1325 }
1326
1327 static const struct file_operations radio_rsq_fops = {
1328 .open = simple_open,
1329 .llseek = default_llseek,
1330 .read = si476x_radio_read_rsq_blob,
1331 };
1332
si476x_radio_read_rsq_primary_blob(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)1333 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1334 char __user *user_buf,
1335 size_t count, loff_t *ppos)
1336 {
1337 int err;
1338 struct si476x_radio *radio = file->private_data;
1339 struct si476x_rsq_status_report report;
1340 struct si476x_rsq_status_args args = {
1341 .primary = true,
1342 .rsqack = false,
1343 .attune = false,
1344 .cancel = false,
1345 .stcack = false,
1346 };
1347
1348 si476x_core_lock(radio->core);
1349 if (radio->ops->rds_blckcnt)
1350 err = radio->ops->rsq_status(radio->core, &args, &report);
1351 else
1352 err = -ENOENT;
1353 si476x_core_unlock(radio->core);
1354
1355 if (err < 0)
1356 return err;
1357
1358 return simple_read_from_buffer(user_buf, count, ppos, &report,
1359 sizeof(report));
1360 }
1361
1362 static const struct file_operations radio_rsq_primary_fops = {
1363 .open = simple_open,
1364 .llseek = default_llseek,
1365 .read = si476x_radio_read_rsq_primary_blob,
1366 };
1367
1368
si476x_radio_init_debugfs(struct si476x_radio * radio)1369 static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1370 {
1371 struct dentry *dentry;
1372 int ret;
1373
1374 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1375 if (IS_ERR(dentry)) {
1376 ret = PTR_ERR(dentry);
1377 goto exit;
1378 }
1379 radio->debugfs = dentry;
1380
1381 dentry = debugfs_create_file("acf", S_IRUGO,
1382 radio->debugfs, radio, &radio_acf_fops);
1383 if (IS_ERR(dentry)) {
1384 ret = PTR_ERR(dentry);
1385 goto cleanup;
1386 }
1387
1388 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1389 radio->debugfs, radio,
1390 &radio_rds_blckcnt_fops);
1391 if (IS_ERR(dentry)) {
1392 ret = PTR_ERR(dentry);
1393 goto cleanup;
1394 }
1395
1396 dentry = debugfs_create_file("agc", S_IRUGO,
1397 radio->debugfs, radio, &radio_agc_fops);
1398 if (IS_ERR(dentry)) {
1399 ret = PTR_ERR(dentry);
1400 goto cleanup;
1401 }
1402
1403 dentry = debugfs_create_file("rsq", S_IRUGO,
1404 radio->debugfs, radio, &radio_rsq_fops);
1405 if (IS_ERR(dentry)) {
1406 ret = PTR_ERR(dentry);
1407 goto cleanup;
1408 }
1409
1410 dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1411 radio->debugfs, radio,
1412 &radio_rsq_primary_fops);
1413 if (IS_ERR(dentry)) {
1414 ret = PTR_ERR(dentry);
1415 goto cleanup;
1416 }
1417
1418 return 0;
1419 cleanup:
1420 debugfs_remove_recursive(radio->debugfs);
1421 exit:
1422 return ret;
1423 }
1424
1425
si476x_radio_add_new_custom(struct si476x_radio * radio,enum si476x_ctrl_idx idx)1426 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1427 enum si476x_ctrl_idx idx)
1428 {
1429 int rval;
1430 struct v4l2_ctrl *ctrl;
1431
1432 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1433 &si476x_ctrls[idx],
1434 NULL);
1435 rval = radio->ctrl_handler.error;
1436 if (ctrl == NULL && rval)
1437 dev_err(radio->v4l2dev.dev,
1438 "Could not initialize '%s' control %d\n",
1439 si476x_ctrls[idx].name, rval);
1440
1441 return rval;
1442 }
1443
si476x_radio_probe(struct platform_device * pdev)1444 static int si476x_radio_probe(struct platform_device *pdev)
1445 {
1446 int rval;
1447 struct si476x_radio *radio;
1448 struct v4l2_ctrl *ctrl;
1449
1450 static atomic_t instance = ATOMIC_INIT(0);
1451
1452 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1453 if (!radio)
1454 return -ENOMEM;
1455
1456 radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1457
1458 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1459
1460 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1461 if (rval) {
1462 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1463 return rval;
1464 }
1465
1466 memcpy(&radio->videodev, &si476x_viddev_template,
1467 sizeof(struct video_device));
1468
1469 radio->videodev.v4l2_dev = &radio->v4l2dev;
1470 radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1471
1472 video_set_drvdata(&radio->videodev, radio);
1473 platform_set_drvdata(pdev, radio);
1474
1475
1476 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1477 v4l2_ctrl_handler_init(&radio->ctrl_handler,
1478 1 + ARRAY_SIZE(si476x_ctrls));
1479
1480 if (si476x_core_has_am(radio->core)) {
1481 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1482 &si476x_ctrl_ops,
1483 V4L2_CID_POWER_LINE_FREQUENCY,
1484 V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1485 0, 0);
1486 rval = radio->ctrl_handler.error;
1487 if (ctrl == NULL && rval) {
1488 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1489 rval);
1490 goto exit;
1491 }
1492
1493 rval = si476x_radio_add_new_custom(radio,
1494 SI476X_IDX_HARMONICS_COUNT);
1495 if (rval < 0)
1496 goto exit;
1497 }
1498
1499 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1500 if (rval < 0)
1501 goto exit;
1502
1503 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1504 if (rval < 0)
1505 goto exit;
1506
1507 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1508 if (rval < 0)
1509 goto exit;
1510
1511 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1512 &si476x_ctrl_ops,
1513 V4L2_CID_TUNE_DEEMPHASIS,
1514 V4L2_DEEMPHASIS_75_uS, 0, 0);
1515 rval = radio->ctrl_handler.error;
1516 if (ctrl == NULL && rval) {
1517 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1518 rval);
1519 goto exit;
1520 }
1521
1522 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1523 V4L2_CID_RDS_RECEPTION,
1524 0, 1, 1, 1);
1525 rval = radio->ctrl_handler.error;
1526 if (ctrl == NULL && rval) {
1527 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1528 rval);
1529 goto exit;
1530 }
1531
1532 if (si476x_core_has_diversity(radio->core)) {
1533 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1534 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1535 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1536 if (rval < 0)
1537 goto exit;
1538
1539 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1540 if (rval < 0)
1541 goto exit;
1542 }
1543
1544 /* register video device */
1545 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1546 if (rval < 0) {
1547 dev_err(&pdev->dev, "Could not register video device\n");
1548 goto exit;
1549 }
1550
1551 rval = si476x_radio_init_debugfs(radio);
1552 if (rval < 0) {
1553 dev_err(&pdev->dev, "Could not creat debugfs interface\n");
1554 goto exit;
1555 }
1556
1557 return 0;
1558 exit:
1559 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1560 return rval;
1561 }
1562
si476x_radio_remove(struct platform_device * pdev)1563 static int si476x_radio_remove(struct platform_device *pdev)
1564 {
1565 struct si476x_radio *radio = platform_get_drvdata(pdev);
1566
1567 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1568 video_unregister_device(&radio->videodev);
1569 v4l2_device_unregister(&radio->v4l2dev);
1570 debugfs_remove_recursive(radio->debugfs);
1571
1572 return 0;
1573 }
1574
1575 MODULE_ALIAS("platform:si476x-radio");
1576
1577 static struct platform_driver si476x_radio_driver = {
1578 .driver = {
1579 .name = DRIVER_NAME,
1580 },
1581 .probe = si476x_radio_probe,
1582 .remove = si476x_radio_remove,
1583 };
1584 module_platform_driver(si476x_radio_driver);
1585
1586 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1587 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1588 MODULE_LICENSE("GPL");
1589
