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b879a9c2 AS |
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 | ||
d647f0b7 | 34 | #include <media/drv-intf/si476x.h> |
b879a9c2 AS |
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 | ||
ab671788 | 47 | #define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0x80 & (status)) |
b879a9c2 AS |
48 | |
49 | #define DRIVER_NAME "si476x-radio" | |
50 | #define DRIVER_CARD "SI476x AM/FM Receiver" | |
51 | ||
52 | enum si476x_freq_bands { | |
53 | SI476X_BAND_FM, | |
54 | SI476X_BAND_AM, | |
55 | }; | |
56 | ||
57 | static const struct v4l2_frequency_band si476x_bands[] = { | |
58 | [SI476X_BAND_FM] = { | |
59 | .type = V4L2_TUNER_RADIO, | |
60 | .index = SI476X_BAND_FM, | |
61 | .capability = V4L2_TUNER_CAP_LOW | |
62 | | V4L2_TUNER_CAP_STEREO | |
63 | | V4L2_TUNER_CAP_RDS | |
64 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
65 | | V4L2_TUNER_CAP_FREQ_BANDS, | |
66 | .rangelow = 64 * FREQ_MUL, | |
67 | .rangehigh = 108 * FREQ_MUL, | |
68 | .modulation = V4L2_BAND_MODULATION_FM, | |
69 | }, | |
70 | [SI476X_BAND_AM] = { | |
71 | .type = V4L2_TUNER_RADIO, | |
72 | .index = SI476X_BAND_AM, | |
73 | .capability = V4L2_TUNER_CAP_LOW | |
74 | | V4L2_TUNER_CAP_FREQ_BANDS, | |
75 | .rangelow = 0.52 * FREQ_MUL, | |
76 | .rangehigh = 30 * FREQ_MUL, | |
77 | .modulation = V4L2_BAND_MODULATION_AM, | |
78 | }, | |
79 | }; | |
80 | ||
81 | static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) | |
82 | { | |
83 | return freq >= si476x_bands[band].rangelow && | |
84 | freq <= si476x_bands[band].rangehigh; | |
85 | } | |
86 | ||
87 | static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, | |
88 | int band) | |
89 | { | |
90 | return low >= si476x_bands[band].rangelow && | |
91 | high <= si476x_bands[band].rangehigh; | |
92 | } | |
93 | ||
94 | static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); | |
95 | static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); | |
96 | ||
97 | enum phase_diversity_modes_idx { | |
98 | SI476X_IDX_PHDIV_DISABLED, | |
99 | SI476X_IDX_PHDIV_PRIMARY_COMBINING, | |
100 | SI476X_IDX_PHDIV_PRIMARY_ANTENNA, | |
101 | SI476X_IDX_PHDIV_SECONDARY_ANTENNA, | |
102 | SI476X_IDX_PHDIV_SECONDARY_COMBINING, | |
103 | }; | |
104 | ||
105 | static const char * const phase_diversity_modes[] = { | |
106 | [SI476X_IDX_PHDIV_DISABLED] = "Disabled", | |
107 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", | |
108 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", | |
109 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", | |
110 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", | |
111 | }; | |
112 | ||
113 | static inline enum phase_diversity_modes_idx | |
114 | si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) | |
115 | { | |
116 | switch (mode) { | |
117 | default: /* FALLTHROUGH */ | |
118 | case SI476X_PHDIV_DISABLED: | |
119 | return SI476X_IDX_PHDIV_DISABLED; | |
120 | case SI476X_PHDIV_PRIMARY_COMBINING: | |
121 | return SI476X_IDX_PHDIV_PRIMARY_COMBINING; | |
122 | case SI476X_PHDIV_PRIMARY_ANTENNA: | |
123 | return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; | |
124 | case SI476X_PHDIV_SECONDARY_ANTENNA: | |
125 | return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; | |
126 | case SI476X_PHDIV_SECONDARY_COMBINING: | |
127 | return SI476X_IDX_PHDIV_SECONDARY_COMBINING; | |
128 | } | |
129 | } | |
130 | ||
131 | static inline enum si476x_phase_diversity_mode | |
132 | si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) | |
133 | { | |
134 | static const int idx_to_value[] = { | |
135 | [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, | |
136 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, | |
137 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, | |
138 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, | |
139 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, | |
140 | }; | |
141 | ||
142 | return idx_to_value[idx]; | |
143 | } | |
144 | ||
145 | static const struct v4l2_ctrl_ops si476x_ctrl_ops = { | |
146 | .g_volatile_ctrl = si476x_radio_g_volatile_ctrl, | |
147 | .s_ctrl = si476x_radio_s_ctrl, | |
148 | }; | |
149 | ||
150 | ||
151 | enum si476x_ctrl_idx { | |
152 | SI476X_IDX_RSSI_THRESHOLD, | |
153 | SI476X_IDX_SNR_THRESHOLD, | |
154 | SI476X_IDX_MAX_TUNE_ERROR, | |
155 | SI476X_IDX_HARMONICS_COUNT, | |
156 | SI476X_IDX_DIVERSITY_MODE, | |
157 | SI476X_IDX_INTERCHIP_LINK, | |
158 | }; | |
159 | static struct v4l2_ctrl_config si476x_ctrls[] = { | |
160 | ||
d156f293 | 161 | /* |
b879a9c2 AS |
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 | ||
d156f293 | 200 | /* |
b879a9c2 AS |
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 | ||
d156f293 | 216 | /* |
b879a9c2 AS |
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 | ||
d156f293 | 240 | /* |
b879a9c2 AS |
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 | |
39c1cb2b JM |
271 | * @rsq_status: Get Received Signal Quality(RSQ) status |
272 | * @rds_blckcnt: Get received RDS blocks count | |
b879a9c2 AS |
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 | * | |
d156f293 | 299 | * @v4l2dev: Pointer to V4L2 device created by V4L2 subsystem |
b879a9c2 | 300 | * @videodev: Pointer to video device created by V4L2 subsystem |
d156f293 MCC |
301 | * @ctrl_handler: V4L2 controls handler |
302 | * @core: Pointer to underlying core device | |
b879a9c2 | 303 | * @ops: Vtable of functions. See struct si476x_radio_ops for details |
d156f293 MCC |
304 | * @debugfs: pointer to &strucd dentry for debugfs |
305 | * @audmode: audio mode, as defined for the rxsubchans field | |
306 | * at videodev2.h | |
307 | * | |
b879a9c2 AS |
308 | * core structure is the radio device is being used |
309 | */ | |
310 | struct si476x_radio { | |
311 | struct v4l2_device v4l2dev; | |
312 | struct video_device videodev; | |
313 | struct v4l2_ctrl_handler ctrl_handler; | |
314 | ||
315 | struct si476x_core *core; | |
316 | /* This field should not be accesses unless core lock is held */ | |
317 | const struct si476x_radio_ops *ops; | |
318 | ||
319 | struct dentry *debugfs; | |
320 | u32 audmode; | |
321 | }; | |
322 | ||
323 | static inline struct si476x_radio * | |
324 | v4l2_dev_to_radio(struct v4l2_device *d) | |
325 | { | |
326 | return container_of(d, struct si476x_radio, v4l2dev); | |
327 | } | |
328 | ||
329 | static inline struct si476x_radio * | |
330 | v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d) | |
331 | { | |
332 | return container_of(d, struct si476x_radio, ctrl_handler); | |
333 | } | |
334 | ||
335 | /* | |
336 | * si476x_vidioc_querycap - query device capabilities | |
337 | */ | |
338 | static int si476x_radio_querycap(struct file *file, void *priv, | |
339 | struct v4l2_capability *capability) | |
340 | { | |
341 | struct si476x_radio *radio = video_drvdata(file); | |
342 | ||
343 | strlcpy(capability->driver, radio->v4l2dev.name, | |
344 | sizeof(capability->driver)); | |
345 | strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); | |
346 | snprintf(capability->bus_info, sizeof(capability->bus_info), | |
347 | "platform:%s", radio->v4l2dev.name); | |
348 | ||
349 | capability->device_caps = V4L2_CAP_TUNER | |
350 | | V4L2_CAP_RADIO | |
351 | | V4L2_CAP_HW_FREQ_SEEK; | |
352 | ||
353 | si476x_core_lock(radio->core); | |
354 | if (!si476x_core_is_a_secondary_tuner(radio->core)) | |
355 | capability->device_caps |= V4L2_CAP_RDS_CAPTURE | |
356 | | V4L2_CAP_READWRITE; | |
357 | si476x_core_unlock(radio->core); | |
358 | ||
359 | capability->capabilities = capability->device_caps | |
360 | | V4L2_CAP_DEVICE_CAPS; | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static int si476x_radio_enum_freq_bands(struct file *file, void *priv, | |
365 | struct v4l2_frequency_band *band) | |
366 | { | |
367 | int err; | |
368 | struct si476x_radio *radio = video_drvdata(file); | |
369 | ||
370 | if (band->tuner != 0) | |
371 | return -EINVAL; | |
372 | ||
373 | switch (radio->core->chip_id) { | |
374 | /* AM/FM tuners -- all bands are supported */ | |
375 | case SI476X_CHIP_SI4761: | |
376 | case SI476X_CHIP_SI4764: | |
377 | if (band->index < ARRAY_SIZE(si476x_bands)) { | |
378 | *band = si476x_bands[band->index]; | |
379 | err = 0; | |
380 | } else { | |
381 | err = -EINVAL; | |
382 | } | |
383 | break; | |
384 | /* FM companion tuner chips -- only FM bands are | |
385 | * supported */ | |
386 | case SI476X_CHIP_SI4768: | |
387 | if (band->index == SI476X_BAND_FM) { | |
388 | *band = si476x_bands[band->index]; | |
389 | err = 0; | |
390 | } else { | |
391 | err = -EINVAL; | |
392 | } | |
393 | break; | |
394 | default: | |
395 | err = -EINVAL; | |
396 | } | |
397 | ||
398 | return err; | |
399 | } | |
400 | ||
401 | static int si476x_radio_g_tuner(struct file *file, void *priv, | |
402 | struct v4l2_tuner *tuner) | |
403 | { | |
404 | int err; | |
405 | struct si476x_rsq_status_report report; | |
406 | struct si476x_radio *radio = video_drvdata(file); | |
407 | ||
408 | struct si476x_rsq_status_args args = { | |
409 | .primary = false, | |
410 | .rsqack = false, | |
411 | .attune = false, | |
412 | .cancel = false, | |
413 | .stcack = false, | |
414 | }; | |
415 | ||
416 | if (tuner->index != 0) | |
417 | return -EINVAL; | |
418 | ||
419 | tuner->type = V4L2_TUNER_RADIO; | |
420 | tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies | |
421 | * in multiples of | |
422 | * 62.5 Hz */ | |
423 | | V4L2_TUNER_CAP_STEREO | |
424 | | V4L2_TUNER_CAP_HWSEEK_BOUNDED | |
425 | | V4L2_TUNER_CAP_HWSEEK_WRAP | |
426 | | V4L2_TUNER_CAP_HWSEEK_PROG_LIM; | |
427 | ||
428 | si476x_core_lock(radio->core); | |
429 | ||
430 | if (si476x_core_is_a_secondary_tuner(radio->core)) { | |
431 | strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name)); | |
432 | tuner->rxsubchans = 0; | |
433 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; | |
434 | } else if (si476x_core_has_am(radio->core)) { | |
435 | if (si476x_core_is_a_primary_tuner(radio->core)) | |
436 | strlcpy(tuner->name, "AM/FM (primary)", | |
437 | sizeof(tuner->name)); | |
438 | else | |
439 | strlcpy(tuner->name, "AM/FM", sizeof(tuner->name)); | |
440 | ||
441 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | |
442 | | V4L2_TUNER_SUB_RDS; | |
443 | tuner->capability |= V4L2_TUNER_CAP_RDS | |
444 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
445 | | V4L2_TUNER_CAP_FREQ_BANDS; | |
446 | ||
447 | tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow; | |
448 | } else { | |
449 | strlcpy(tuner->name, "FM", sizeof(tuner->name)); | |
450 | tuner->rxsubchans = V4L2_TUNER_SUB_RDS; | |
451 | tuner->capability |= V4L2_TUNER_CAP_RDS | |
452 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
453 | | V4L2_TUNER_CAP_FREQ_BANDS; | |
454 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; | |
455 | } | |
456 | ||
457 | tuner->audmode = radio->audmode; | |
458 | ||
459 | tuner->afc = 1; | |
460 | tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh; | |
461 | ||
462 | err = radio->ops->rsq_status(radio->core, | |
463 | &args, &report); | |
464 | if (err < 0) { | |
465 | tuner->signal = 0; | |
466 | } else { | |
467 | /* | |
468 | * tuner->signal value range: 0x0000 .. 0xFFFF, | |
469 | * report.rssi: -128 .. 127 | |
470 | */ | |
471 | tuner->signal = (report.rssi + 128) * 257; | |
472 | } | |
473 | si476x_core_unlock(radio->core); | |
474 | ||
475 | return err; | |
476 | } | |
477 | ||
478 | static int si476x_radio_s_tuner(struct file *file, void *priv, | |
479 | const struct v4l2_tuner *tuner) | |
480 | { | |
481 | struct si476x_radio *radio = video_drvdata(file); | |
482 | ||
483 | if (tuner->index != 0) | |
484 | return -EINVAL; | |
485 | ||
486 | if (tuner->audmode == V4L2_TUNER_MODE_MONO || | |
487 | tuner->audmode == V4L2_TUNER_MODE_STEREO) | |
488 | radio->audmode = tuner->audmode; | |
489 | else | |
490 | radio->audmode = V4L2_TUNER_MODE_STEREO; | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | static int si476x_radio_init_vtable(struct si476x_radio *radio, | |
496 | enum si476x_func func) | |
497 | { | |
498 | static const struct si476x_radio_ops fm_ops = { | |
499 | .tune_freq = si476x_core_cmd_fm_tune_freq, | |
500 | .seek_start = si476x_core_cmd_fm_seek_start, | |
501 | .rsq_status = si476x_core_cmd_fm_rsq_status, | |
502 | .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount, | |
503 | .phase_diversity = si476x_core_cmd_fm_phase_diversity, | |
504 | .phase_div_status = si476x_core_cmd_fm_phase_div_status, | |
505 | .acf_status = si476x_core_cmd_fm_acf_status, | |
506 | .agc_status = si476x_core_cmd_agc_status, | |
507 | }; | |
508 | ||
509 | static const struct si476x_radio_ops am_ops = { | |
510 | .tune_freq = si476x_core_cmd_am_tune_freq, | |
511 | .seek_start = si476x_core_cmd_am_seek_start, | |
512 | .rsq_status = si476x_core_cmd_am_rsq_status, | |
513 | .rds_blckcnt = NULL, | |
514 | .phase_diversity = NULL, | |
515 | .phase_div_status = NULL, | |
516 | .acf_status = si476x_core_cmd_am_acf_status, | |
517 | .agc_status = NULL, | |
518 | }; | |
519 | ||
520 | switch (func) { | |
521 | case SI476X_FUNC_FM_RECEIVER: | |
522 | radio->ops = &fm_ops; | |
523 | return 0; | |
524 | ||
525 | case SI476X_FUNC_AM_RECEIVER: | |
526 | radio->ops = &am_ops; | |
527 | return 0; | |
528 | default: | |
529 | WARN(1, "Unexpected tuner function value\n"); | |
530 | return -EINVAL; | |
531 | } | |
532 | } | |
533 | ||
534 | static int si476x_radio_pretune(struct si476x_radio *radio, | |
535 | enum si476x_func func) | |
536 | { | |
537 | int retval; | |
538 | ||
539 | struct si476x_tune_freq_args args = { | |
540 | .zifsr = false, | |
541 | .hd = false, | |
542 | .injside = SI476X_INJSIDE_AUTO, | |
543 | .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE, | |
544 | .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO, | |
545 | .antcap = 0, | |
546 | }; | |
547 | ||
548 | switch (func) { | |
549 | case SI476X_FUNC_FM_RECEIVER: | |
550 | args.freq = v4l2_to_si476x(radio->core, | |
551 | 92 * FREQ_MUL); | |
552 | retval = radio->ops->tune_freq(radio->core, &args); | |
553 | break; | |
554 | case SI476X_FUNC_AM_RECEIVER: | |
555 | args.freq = v4l2_to_si476x(radio->core, | |
556 | 0.6 * FREQ_MUL); | |
557 | retval = radio->ops->tune_freq(radio->core, &args); | |
558 | break; | |
559 | default: | |
560 | WARN(1, "Unexpected tuner function value\n"); | |
561 | retval = -EINVAL; | |
562 | } | |
563 | ||
564 | return retval; | |
565 | } | |
566 | static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio, | |
567 | enum si476x_func func) | |
568 | { | |
569 | int err; | |
570 | ||
571 | /* regcache_mark_dirty(radio->core->regmap); */ | |
572 | err = regcache_sync_region(radio->core->regmap, | |
573 | SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE, | |
574 | SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT); | |
1cb3b795 MCC |
575 | if (err < 0) |
576 | return err; | |
b879a9c2 AS |
577 | |
578 | err = regcache_sync_region(radio->core->regmap, | |
579 | SI476X_PROP_AUDIO_DEEMPHASIS, | |
580 | SI476X_PROP_AUDIO_PWR_LINE_FILTER); | |
581 | if (err < 0) | |
582 | return err; | |
583 | ||
584 | err = regcache_sync_region(radio->core->regmap, | |
585 | SI476X_PROP_INT_CTL_ENABLE, | |
586 | SI476X_PROP_INT_CTL_ENABLE); | |
587 | if (err < 0) | |
588 | return err; | |
589 | ||
590 | /* | |
591 | * Is there any point in restoring SNR and the like | |
592 | * when switching between AM/FM? | |
593 | */ | |
594 | err = regcache_sync_region(radio->core->regmap, | |
595 | SI476X_PROP_VALID_MAX_TUNE_ERROR, | |
596 | SI476X_PROP_VALID_MAX_TUNE_ERROR); | |
597 | if (err < 0) | |
598 | return err; | |
599 | ||
600 | err = regcache_sync_region(radio->core->regmap, | |
601 | SI476X_PROP_VALID_SNR_THRESHOLD, | |
602 | SI476X_PROP_VALID_RSSI_THRESHOLD); | |
603 | if (err < 0) | |
604 | return err; | |
605 | ||
606 | if (func == SI476X_FUNC_FM_RECEIVER) { | |
607 | if (si476x_core_has_diversity(radio->core)) { | |
608 | err = si476x_core_cmd_fm_phase_diversity(radio->core, | |
609 | radio->core->diversity_mode); | |
610 | if (err < 0) | |
611 | return err; | |
612 | } | |
613 | ||
614 | err = regcache_sync_region(radio->core->regmap, | |
615 | SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, | |
616 | SI476X_PROP_FM_RDS_CONFIG); | |
617 | if (err < 0) | |
618 | return err; | |
619 | } | |
620 | ||
621 | return si476x_radio_init_vtable(radio, func); | |
622 | ||
623 | } | |
624 | ||
625 | static int si476x_radio_change_func(struct si476x_radio *radio, | |
626 | enum si476x_func func) | |
627 | { | |
628 | int err; | |
629 | bool soft; | |
630 | /* | |
631 | * Since power/up down is a very time consuming operation, | |
632 | * try to avoid doing it if the requested mode matches the one | |
633 | * the tuner is in | |
634 | */ | |
635 | if (func == radio->core->power_up_parameters.func) | |
636 | return 0; | |
637 | ||
638 | soft = true; | |
639 | err = si476x_core_stop(radio->core, soft); | |
640 | if (err < 0) { | |
641 | /* | |
642 | * OK, if the chip does not want to play nice let's | |
643 | * try to reset it in more brutal way | |
644 | */ | |
645 | soft = false; | |
646 | err = si476x_core_stop(radio->core, soft); | |
647 | if (err < 0) | |
648 | return err; | |
649 | } | |
650 | /* | |
651 | Set the desired radio tuner function | |
652 | */ | |
653 | radio->core->power_up_parameters.func = func; | |
654 | ||
655 | err = si476x_core_start(radio->core, soft); | |
656 | if (err < 0) | |
657 | return err; | |
658 | ||
659 | /* | |
660 | * No need to do the rest of manipulations for the bootlader | |
661 | * mode | |
662 | */ | |
663 | if (func != SI476X_FUNC_FM_RECEIVER && | |
664 | func != SI476X_FUNC_AM_RECEIVER) | |
665 | return err; | |
666 | ||
667 | return si476x_radio_do_post_powerup_init(radio, func); | |
668 | } | |
669 | ||
670 | static int si476x_radio_g_frequency(struct file *file, void *priv, | |
671 | struct v4l2_frequency *f) | |
672 | { | |
673 | int err; | |
674 | struct si476x_radio *radio = video_drvdata(file); | |
675 | ||
676 | if (f->tuner != 0 || | |
677 | f->type != V4L2_TUNER_RADIO) | |
678 | return -EINVAL; | |
679 | ||
680 | si476x_core_lock(radio->core); | |
681 | ||
682 | if (radio->ops->rsq_status) { | |
683 | struct si476x_rsq_status_report report; | |
684 | struct si476x_rsq_status_args args = { | |
685 | .primary = false, | |
686 | .rsqack = false, | |
687 | .attune = true, | |
688 | .cancel = false, | |
689 | .stcack = false, | |
690 | }; | |
691 | ||
692 | err = radio->ops->rsq_status(radio->core, &args, &report); | |
693 | if (!err) | |
694 | f->frequency = si476x_to_v4l2(radio->core, | |
695 | report.readfreq); | |
696 | } else { | |
697 | err = -EINVAL; | |
698 | } | |
699 | ||
700 | si476x_core_unlock(radio->core); | |
701 | ||
702 | return err; | |
703 | } | |
704 | ||
705 | static int si476x_radio_s_frequency(struct file *file, void *priv, | |
706 | const struct v4l2_frequency *f) | |
707 | { | |
708 | int err; | |
709 | u32 freq = f->frequency; | |
710 | struct si476x_tune_freq_args args; | |
711 | struct si476x_radio *radio = video_drvdata(file); | |
712 | ||
713 | const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh + | |
714 | si476x_bands[SI476X_BAND_FM].rangelow) / 2; | |
715 | const int band = (freq > midrange) ? | |
716 | SI476X_BAND_FM : SI476X_BAND_AM; | |
717 | const enum si476x_func func = (band == SI476X_BAND_AM) ? | |
718 | SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER; | |
719 | ||
720 | if (f->tuner != 0 || | |
721 | f->type != V4L2_TUNER_RADIO) | |
722 | return -EINVAL; | |
723 | ||
724 | si476x_core_lock(radio->core); | |
725 | ||
726 | freq = clamp(freq, | |
727 | si476x_bands[band].rangelow, | |
728 | si476x_bands[band].rangehigh); | |
729 | ||
730 | if (si476x_radio_freq_is_inside_of_the_band(freq, | |
731 | SI476X_BAND_AM) && | |
732 | (!si476x_core_has_am(radio->core) || | |
733 | si476x_core_is_a_secondary_tuner(radio->core))) { | |
734 | err = -EINVAL; | |
735 | goto unlock; | |
736 | } | |
737 | ||
738 | err = si476x_radio_change_func(radio, func); | |
739 | if (err < 0) | |
740 | goto unlock; | |
741 | ||
742 | args.zifsr = false; | |
743 | args.hd = false; | |
744 | args.injside = SI476X_INJSIDE_AUTO; | |
745 | args.freq = v4l2_to_si476x(radio->core, freq); | |
746 | args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE; | |
747 | args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO; | |
748 | args.antcap = 0; | |
749 | ||
750 | err = radio->ops->tune_freq(radio->core, &args); | |
751 | ||
752 | unlock: | |
753 | si476x_core_unlock(radio->core); | |
754 | return err; | |
755 | } | |
756 | ||
757 | static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv, | |
758 | const struct v4l2_hw_freq_seek *seek) | |
759 | { | |
760 | int err; | |
761 | enum si476x_func func; | |
02d73243 | 762 | u32 rangelow = seek->rangelow, rangehigh = seek->rangehigh; |
b879a9c2 AS |
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 | ||
02d73243 | 774 | if (!rangelow) { |
b879a9c2 AS |
775 | err = regmap_read(radio->core->regmap, |
776 | SI476X_PROP_SEEK_BAND_BOTTOM, | |
777 | &rangelow); | |
02d73243 | 778 | if (err) |
b879a9c2 | 779 | goto unlock; |
02d73243 | 780 | rangelow = si476x_to_v4l2(radio->core, rangelow); |
b879a9c2 | 781 | } |
02d73243 | 782 | if (!rangehigh) { |
b879a9c2 AS |
783 | err = regmap_read(radio->core->regmap, |
784 | SI476X_PROP_SEEK_BAND_TOP, | |
785 | &rangehigh); | |
02d73243 | 786 | if (err) |
b879a9c2 | 787 | goto unlock; |
02d73243 | 788 | rangehigh = si476x_to_v4l2(radio->core, rangehigh); |
b879a9c2 AS |
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 | ||
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 | ||
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 | ||
b879a9c2 AS |
1023 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
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 | } | |
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 | ||
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 | ||
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 | ||
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 | ||
c23e0cb8 | 1154 | static __poll_t si476x_radio_fops_poll(struct file *file, |
b879a9c2 AS |
1155 | struct poll_table_struct *pts) |
1156 | { | |
1157 | struct si476x_radio *radio = video_drvdata(file); | |
01699437 | 1158 | __poll_t req_events = poll_requested_events(pts); |
c23e0cb8 | 1159 | __poll_t err = v4l2_ctrl_poll(file, pts); |
b879a9c2 | 1160 | |
a9a08845 | 1161 | if (req_events & (EPOLLIN | EPOLLRDNORM)) { |
b879a9c2 AS |
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)) | |
a9a08845 | 1166 | err = EPOLLHUP; |
b879a9c2 AS |
1167 | |
1168 | if (!kfifo_is_empty(&radio->core->rds_fifo)) | |
a9a08845 | 1169 | err = EPOLLIN | EPOLLRDNORM; |
b879a9c2 AS |
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 | ||
b879a9c2 AS |
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
b879a9c2 AS |
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); | |
949cf706 | 1535 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); |
b879a9c2 AS |
1536 | if (rval < 0) |
1537 | goto exit; | |
1538 | ||
949cf706 | 1539 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK); |
b879a9c2 AS |
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 | ||
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, | |
b879a9c2 AS |
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"); |