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