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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 | ||
34 | #include <media/si476x.h> | |
35 | #include <linux/mfd/si476x-core.h> | |
36 | ||
37 | #define FM_FREQ_RANGE_LOW 64000000 | |
38 | #define FM_FREQ_RANGE_HIGH 108000000 | |
39 | ||
40 | #define AM_FREQ_RANGE_LOW 520000 | |
41 | #define AM_FREQ_RANGE_HIGH 30000000 | |
42 | ||
43 | #define PWRLINEFLTR (1 << 8) | |
44 | ||
45 | #define FREQ_MUL (10000000 / 625) | |
46 | ||
47 | #define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0b10000000 & (status)) | |
48 | ||
49 | #define DRIVER_NAME "si476x-radio" | |
50 | #define DRIVER_CARD "SI476x AM/FM Receiver" | |
51 | ||
52 | enum si476x_freq_bands { | |
53 | SI476X_BAND_FM, | |
54 | SI476X_BAND_AM, | |
55 | }; | |
56 | ||
57 | static const struct v4l2_frequency_band si476x_bands[] = { | |
58 | [SI476X_BAND_FM] = { | |
59 | .type = V4L2_TUNER_RADIO, | |
60 | .index = SI476X_BAND_FM, | |
61 | .capability = V4L2_TUNER_CAP_LOW | |
62 | | V4L2_TUNER_CAP_STEREO | |
63 | | V4L2_TUNER_CAP_RDS | |
64 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
65 | | V4L2_TUNER_CAP_FREQ_BANDS, | |
66 | .rangelow = 64 * FREQ_MUL, | |
67 | .rangehigh = 108 * FREQ_MUL, | |
68 | .modulation = V4L2_BAND_MODULATION_FM, | |
69 | }, | |
70 | [SI476X_BAND_AM] = { | |
71 | .type = V4L2_TUNER_RADIO, | |
72 | .index = SI476X_BAND_AM, | |
73 | .capability = V4L2_TUNER_CAP_LOW | |
74 | | V4L2_TUNER_CAP_FREQ_BANDS, | |
75 | .rangelow = 0.52 * FREQ_MUL, | |
76 | .rangehigh = 30 * FREQ_MUL, | |
77 | .modulation = V4L2_BAND_MODULATION_AM, | |
78 | }, | |
79 | }; | |
80 | ||
81 | static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) | |
82 | { | |
83 | return freq >= si476x_bands[band].rangelow && | |
84 | freq <= si476x_bands[band].rangehigh; | |
85 | } | |
86 | ||
87 | static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, | |
88 | int band) | |
89 | { | |
90 | return low >= si476x_bands[band].rangelow && | |
91 | high <= si476x_bands[band].rangehigh; | |
92 | } | |
93 | ||
94 | static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); | |
95 | static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); | |
96 | ||
97 | enum phase_diversity_modes_idx { | |
98 | SI476X_IDX_PHDIV_DISABLED, | |
99 | SI476X_IDX_PHDIV_PRIMARY_COMBINING, | |
100 | SI476X_IDX_PHDIV_PRIMARY_ANTENNA, | |
101 | SI476X_IDX_PHDIV_SECONDARY_ANTENNA, | |
102 | SI476X_IDX_PHDIV_SECONDARY_COMBINING, | |
103 | }; | |
104 | ||
105 | static const char * const phase_diversity_modes[] = { | |
106 | [SI476X_IDX_PHDIV_DISABLED] = "Disabled", | |
107 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", | |
108 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", | |
109 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", | |
110 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", | |
111 | }; | |
112 | ||
113 | static inline enum phase_diversity_modes_idx | |
114 | si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) | |
115 | { | |
116 | switch (mode) { | |
117 | default: /* FALLTHROUGH */ | |
118 | case SI476X_PHDIV_DISABLED: | |
119 | return SI476X_IDX_PHDIV_DISABLED; | |
120 | case SI476X_PHDIV_PRIMARY_COMBINING: | |
121 | return SI476X_IDX_PHDIV_PRIMARY_COMBINING; | |
122 | case SI476X_PHDIV_PRIMARY_ANTENNA: | |
123 | return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; | |
124 | case SI476X_PHDIV_SECONDARY_ANTENNA: | |
125 | return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; | |
126 | case SI476X_PHDIV_SECONDARY_COMBINING: | |
127 | return SI476X_IDX_PHDIV_SECONDARY_COMBINING; | |
128 | } | |
129 | } | |
130 | ||
131 | static inline enum si476x_phase_diversity_mode | |
132 | si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) | |
133 | { | |
134 | static const int idx_to_value[] = { | |
135 | [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, | |
136 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, | |
137 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, | |
138 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, | |
139 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, | |
140 | }; | |
141 | ||
142 | return idx_to_value[idx]; | |
143 | } | |
144 | ||
145 | static const struct v4l2_ctrl_ops si476x_ctrl_ops = { | |
146 | .g_volatile_ctrl = si476x_radio_g_volatile_ctrl, | |
147 | .s_ctrl = si476x_radio_s_ctrl, | |
148 | }; | |
149 | ||
150 | ||
151 | enum si476x_ctrl_idx { | |
152 | SI476X_IDX_RSSI_THRESHOLD, | |
153 | SI476X_IDX_SNR_THRESHOLD, | |
154 | SI476X_IDX_MAX_TUNE_ERROR, | |
155 | SI476X_IDX_HARMONICS_COUNT, | |
156 | SI476X_IDX_DIVERSITY_MODE, | |
157 | SI476X_IDX_INTERCHIP_LINK, | |
158 | }; | |
159 | static struct v4l2_ctrl_config si476x_ctrls[] = { | |
160 | ||
161 | /** | |
162 | * SI476X during its station seeking(or tuning) process uses several | |
163 | * parameters to detrmine if "the station" is valid: | |
164 | * | |
165 | * - Signal's SNR(in dBuV) must be lower than | |
166 | * #V4L2_CID_SI476X_SNR_THRESHOLD | |
167 | * - Signal's RSSI(in dBuV) must be greater than | |
168 | * #V4L2_CID_SI476X_RSSI_THRESHOLD | |
169 | * - Signal's frequency deviation(in units of 2ppm) must not be | |
170 | * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR | |
171 | */ | |
172 | [SI476X_IDX_RSSI_THRESHOLD] = { | |
173 | .ops = &si476x_ctrl_ops, | |
174 | .id = V4L2_CID_SI476X_RSSI_THRESHOLD, | |
175 | .name = "Valid RSSI Threshold", | |
176 | .type = V4L2_CTRL_TYPE_INTEGER, | |
177 | .min = -128, | |
178 | .max = 127, | |
179 | .step = 1, | |
180 | }, | |
181 | [SI476X_IDX_SNR_THRESHOLD] = { | |
182 | .ops = &si476x_ctrl_ops, | |
183 | .id = V4L2_CID_SI476X_SNR_THRESHOLD, | |
184 | .type = V4L2_CTRL_TYPE_INTEGER, | |
185 | .name = "Valid SNR Threshold", | |
186 | .min = -128, | |
187 | .max = 127, | |
188 | .step = 1, | |
189 | }, | |
190 | [SI476X_IDX_MAX_TUNE_ERROR] = { | |
191 | .ops = &si476x_ctrl_ops, | |
192 | .id = V4L2_CID_SI476X_MAX_TUNE_ERROR, | |
193 | .type = V4L2_CTRL_TYPE_INTEGER, | |
194 | .name = "Max Tune Errors", | |
195 | .min = 0, | |
196 | .max = 126 * 2, | |
197 | .step = 2, | |
198 | }, | |
199 | ||
200 | /** | |
201 | * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics | |
202 | * built-in power-line noise supression filter is to reject | |
203 | * during AM-mode operation. | |
204 | */ | |
205 | [SI476X_IDX_HARMONICS_COUNT] = { | |
206 | .ops = &si476x_ctrl_ops, | |
207 | .id = V4L2_CID_SI476X_HARMONICS_COUNT, | |
208 | .type = V4L2_CTRL_TYPE_INTEGER, | |
209 | ||
210 | .name = "Count of Harmonics to Reject", | |
211 | .min = 0, | |
212 | .max = 20, | |
213 | .step = 1, | |
214 | }, | |
215 | ||
216 | /** | |
217 | * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which | |
218 | * two tuners working in diversity mode are to work in. | |
219 | * | |
220 | * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled | |
221 | * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is | |
222 | * on, primary tuner's antenna is the main one. | |
223 | * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is | |
224 | * off, primary tuner's antenna is the main one. | |
225 | * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is | |
226 | * off, secondary tuner's antenna is the main one. | |
227 | * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is | |
228 | * on, secondary tuner's antenna is the main one. | |
229 | */ | |
230 | [SI476X_IDX_DIVERSITY_MODE] = { | |
231 | .ops = &si476x_ctrl_ops, | |
232 | .id = V4L2_CID_SI476X_DIVERSITY_MODE, | |
233 | .type = V4L2_CTRL_TYPE_MENU, | |
234 | .name = "Phase Diversity Mode", | |
235 | .qmenu = phase_diversity_modes, | |
236 | .min = 0, | |
237 | .max = ARRAY_SIZE(phase_diversity_modes) - 1, | |
238 | }, | |
239 | ||
240 | /** | |
241 | * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in | |
242 | * diversity mode indicator. Allows user to determine if two | |
243 | * chips working in diversity mode have established a link | |
244 | * between each other and if the system as a whole uses | |
245 | * signals from both antennas to receive FM radio. | |
246 | */ | |
247 | [SI476X_IDX_INTERCHIP_LINK] = { | |
248 | .ops = &si476x_ctrl_ops, | |
249 | .id = V4L2_CID_SI476X_INTERCHIP_LINK, | |
250 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
251 | .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, | |
252 | .name = "Inter-Chip Link", | |
253 | .min = 0, | |
254 | .max = 1, | |
255 | .step = 1, | |
256 | }, | |
257 | }; | |
258 | ||
259 | struct si476x_radio; | |
260 | ||
261 | /** | |
262 | * struct si476x_radio_ops - vtable of tuner functions | |
263 | * | |
264 | * This table holds pointers to functions implementing particular | |
265 | * operations depending on the mode in which the tuner chip was | |
266 | * configured to start in. If the function is not supported | |
267 | * corresponding element is set to #NULL. | |
268 | * | |
269 | * @tune_freq: Tune chip to a specific frequency | |
270 | * @seek_start: Star station seeking | |
271 | * @rsq_status: Get Recieved Signal Quality(RSQ) status | |
272 | * @rds_blckcnt: Get recived RDS blocks count | |
273 | * @phase_diversity: Change phase diversity mode of the tuner | |
274 | * @phase_div_status: Get phase diversity mode status | |
275 | * @acf_status: Get the status of Automatically Controlled | |
276 | * Features(ACF) | |
277 | * @agc_status: Get Automatic Gain Control(AGC) status | |
278 | */ | |
279 | struct si476x_radio_ops { | |
280 | int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *); | |
281 | int (*seek_start)(struct si476x_core *, bool, bool); | |
282 | int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *, | |
283 | struct si476x_rsq_status_report *); | |
284 | int (*rds_blckcnt)(struct si476x_core *, bool, | |
285 | struct si476x_rds_blockcount_report *); | |
286 | ||
287 | int (*phase_diversity)(struct si476x_core *, | |
288 | enum si476x_phase_diversity_mode); | |
289 | int (*phase_div_status)(struct si476x_core *); | |
290 | int (*acf_status)(struct si476x_core *, | |
291 | struct si476x_acf_status_report *); | |
292 | int (*agc_status)(struct si476x_core *, | |
293 | struct si476x_agc_status_report *); | |
294 | }; | |
295 | ||
296 | /** | |
297 | * struct si476x_radio - radio device | |
298 | * | |
299 | * @core: Pointer to underlying core device | |
300 | * @videodev: Pointer to video device created by V4L2 subsystem | |
301 | * @ops: Vtable of functions. See struct si476x_radio_ops for details | |
302 | * @kref: Reference counter | |
303 | * @core_lock: An r/w semaphore to brebvent the deletion of underlying | |
304 | * core structure is the radio device is being used | |
305 | */ | |
306 | struct si476x_radio { | |
307 | struct v4l2_device v4l2dev; | |
308 | struct video_device videodev; | |
309 | struct v4l2_ctrl_handler ctrl_handler; | |
310 | ||
311 | struct si476x_core *core; | |
312 | /* This field should not be accesses unless core lock is held */ | |
313 | const struct si476x_radio_ops *ops; | |
314 | ||
315 | struct dentry *debugfs; | |
316 | u32 audmode; | |
317 | }; | |
318 | ||
319 | static inline struct si476x_radio * | |
320 | v4l2_dev_to_radio(struct v4l2_device *d) | |
321 | { | |
322 | return container_of(d, struct si476x_radio, v4l2dev); | |
323 | } | |
324 | ||
325 | static inline struct si476x_radio * | |
326 | v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d) | |
327 | { | |
328 | return container_of(d, struct si476x_radio, ctrl_handler); | |
329 | } | |
330 | ||
331 | /* | |
332 | * si476x_vidioc_querycap - query device capabilities | |
333 | */ | |
334 | static int si476x_radio_querycap(struct file *file, void *priv, | |
335 | struct v4l2_capability *capability) | |
336 | { | |
337 | struct si476x_radio *radio = video_drvdata(file); | |
338 | ||
339 | strlcpy(capability->driver, radio->v4l2dev.name, | |
340 | sizeof(capability->driver)); | |
341 | strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); | |
342 | snprintf(capability->bus_info, sizeof(capability->bus_info), | |
343 | "platform:%s", radio->v4l2dev.name); | |
344 | ||
345 | capability->device_caps = V4L2_CAP_TUNER | |
346 | | V4L2_CAP_RADIO | |
347 | | V4L2_CAP_HW_FREQ_SEEK; | |
348 | ||
349 | si476x_core_lock(radio->core); | |
350 | if (!si476x_core_is_a_secondary_tuner(radio->core)) | |
351 | capability->device_caps |= V4L2_CAP_RDS_CAPTURE | |
352 | | V4L2_CAP_READWRITE; | |
353 | si476x_core_unlock(radio->core); | |
354 | ||
355 | capability->capabilities = capability->device_caps | |
356 | | V4L2_CAP_DEVICE_CAPS; | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int si476x_radio_enum_freq_bands(struct file *file, void *priv, | |
361 | struct v4l2_frequency_band *band) | |
362 | { | |
363 | int err; | |
364 | struct si476x_radio *radio = video_drvdata(file); | |
365 | ||
366 | if (band->tuner != 0) | |
367 | return -EINVAL; | |
368 | ||
369 | switch (radio->core->chip_id) { | |
370 | /* AM/FM tuners -- all bands are supported */ | |
371 | case SI476X_CHIP_SI4761: | |
372 | case SI476X_CHIP_SI4764: | |
373 | if (band->index < ARRAY_SIZE(si476x_bands)) { | |
374 | *band = si476x_bands[band->index]; | |
375 | err = 0; | |
376 | } else { | |
377 | err = -EINVAL; | |
378 | } | |
379 | break; | |
380 | /* FM companion tuner chips -- only FM bands are | |
381 | * supported */ | |
382 | case SI476X_CHIP_SI4768: | |
383 | if (band->index == SI476X_BAND_FM) { | |
384 | *band = si476x_bands[band->index]; | |
385 | err = 0; | |
386 | } else { | |
387 | err = -EINVAL; | |
388 | } | |
389 | break; | |
390 | default: | |
391 | err = -EINVAL; | |
392 | } | |
393 | ||
394 | return err; | |
395 | } | |
396 | ||
397 | static int si476x_radio_g_tuner(struct file *file, void *priv, | |
398 | struct v4l2_tuner *tuner) | |
399 | { | |
400 | int err; | |
401 | struct si476x_rsq_status_report report; | |
402 | struct si476x_radio *radio = video_drvdata(file); | |
403 | ||
404 | struct si476x_rsq_status_args args = { | |
405 | .primary = false, | |
406 | .rsqack = false, | |
407 | .attune = false, | |
408 | .cancel = false, | |
409 | .stcack = false, | |
410 | }; | |
411 | ||
412 | if (tuner->index != 0) | |
413 | return -EINVAL; | |
414 | ||
415 | tuner->type = V4L2_TUNER_RADIO; | |
416 | tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies | |
417 | * in multiples of | |
418 | * 62.5 Hz */ | |
419 | | V4L2_TUNER_CAP_STEREO | |
420 | | V4L2_TUNER_CAP_HWSEEK_BOUNDED | |
421 | | V4L2_TUNER_CAP_HWSEEK_WRAP | |
422 | | V4L2_TUNER_CAP_HWSEEK_PROG_LIM; | |
423 | ||
424 | si476x_core_lock(radio->core); | |
425 | ||
426 | if (si476x_core_is_a_secondary_tuner(radio->core)) { | |
427 | strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name)); | |
428 | tuner->rxsubchans = 0; | |
429 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; | |
430 | } else if (si476x_core_has_am(radio->core)) { | |
431 | if (si476x_core_is_a_primary_tuner(radio->core)) | |
432 | strlcpy(tuner->name, "AM/FM (primary)", | |
433 | sizeof(tuner->name)); | |
434 | else | |
435 | strlcpy(tuner->name, "AM/FM", sizeof(tuner->name)); | |
436 | ||
437 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | |
438 | | V4L2_TUNER_SUB_RDS; | |
439 | tuner->capability |= V4L2_TUNER_CAP_RDS | |
440 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
441 | | V4L2_TUNER_CAP_FREQ_BANDS; | |
442 | ||
443 | tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow; | |
444 | } else { | |
445 | strlcpy(tuner->name, "FM", sizeof(tuner->name)); | |
446 | tuner->rxsubchans = V4L2_TUNER_SUB_RDS; | |
447 | tuner->capability |= V4L2_TUNER_CAP_RDS | |
448 | | V4L2_TUNER_CAP_RDS_BLOCK_IO | |
449 | | V4L2_TUNER_CAP_FREQ_BANDS; | |
450 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; | |
451 | } | |
452 | ||
453 | tuner->audmode = radio->audmode; | |
454 | ||
455 | tuner->afc = 1; | |
456 | tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh; | |
457 | ||
458 | err = radio->ops->rsq_status(radio->core, | |
459 | &args, &report); | |
460 | if (err < 0) { | |
461 | tuner->signal = 0; | |
462 | } else { | |
463 | /* | |
464 | * tuner->signal value range: 0x0000 .. 0xFFFF, | |
465 | * report.rssi: -128 .. 127 | |
466 | */ | |
467 | tuner->signal = (report.rssi + 128) * 257; | |
468 | } | |
469 | si476x_core_unlock(radio->core); | |
470 | ||
471 | return err; | |
472 | } | |
473 | ||
474 | static int si476x_radio_s_tuner(struct file *file, void *priv, | |
475 | const struct v4l2_tuner *tuner) | |
476 | { | |
477 | struct si476x_radio *radio = video_drvdata(file); | |
478 | ||
479 | if (tuner->index != 0) | |
480 | return -EINVAL; | |
481 | ||
482 | if (tuner->audmode == V4L2_TUNER_MODE_MONO || | |
483 | tuner->audmode == V4L2_TUNER_MODE_STEREO) | |
484 | radio->audmode = tuner->audmode; | |
485 | else | |
486 | radio->audmode = V4L2_TUNER_MODE_STEREO; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static int si476x_radio_init_vtable(struct si476x_radio *radio, | |
492 | enum si476x_func func) | |
493 | { | |
494 | static const struct si476x_radio_ops fm_ops = { | |
495 | .tune_freq = si476x_core_cmd_fm_tune_freq, | |
496 | .seek_start = si476x_core_cmd_fm_seek_start, | |
497 | .rsq_status = si476x_core_cmd_fm_rsq_status, | |
498 | .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount, | |
499 | .phase_diversity = si476x_core_cmd_fm_phase_diversity, | |
500 | .phase_div_status = si476x_core_cmd_fm_phase_div_status, | |
501 | .acf_status = si476x_core_cmd_fm_acf_status, | |
502 | .agc_status = si476x_core_cmd_agc_status, | |
503 | }; | |
504 | ||
505 | static const struct si476x_radio_ops am_ops = { | |
506 | .tune_freq = si476x_core_cmd_am_tune_freq, | |
507 | .seek_start = si476x_core_cmd_am_seek_start, | |
508 | .rsq_status = si476x_core_cmd_am_rsq_status, | |
509 | .rds_blckcnt = NULL, | |
510 | .phase_diversity = NULL, | |
511 | .phase_div_status = NULL, | |
512 | .acf_status = si476x_core_cmd_am_acf_status, | |
513 | .agc_status = NULL, | |
514 | }; | |
515 | ||
516 | switch (func) { | |
517 | case SI476X_FUNC_FM_RECEIVER: | |
518 | radio->ops = &fm_ops; | |
519 | return 0; | |
520 | ||
521 | case SI476X_FUNC_AM_RECEIVER: | |
522 | radio->ops = &am_ops; | |
523 | return 0; | |
524 | default: | |
525 | WARN(1, "Unexpected tuner function value\n"); | |
526 | return -EINVAL; | |
527 | } | |
528 | } | |
529 | ||
530 | static int si476x_radio_pretune(struct si476x_radio *radio, | |
531 | enum si476x_func func) | |
532 | { | |
533 | int retval; | |
534 | ||
535 | struct si476x_tune_freq_args args = { | |
536 | .zifsr = false, | |
537 | .hd = false, | |
538 | .injside = SI476X_INJSIDE_AUTO, | |
539 | .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE, | |
540 | .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO, | |
541 | .antcap = 0, | |
542 | }; | |
543 | ||
544 | switch (func) { | |
545 | case SI476X_FUNC_FM_RECEIVER: | |
546 | args.freq = v4l2_to_si476x(radio->core, | |
547 | 92 * FREQ_MUL); | |
548 | retval = radio->ops->tune_freq(radio->core, &args); | |
549 | break; | |
550 | case SI476X_FUNC_AM_RECEIVER: | |
551 | args.freq = v4l2_to_si476x(radio->core, | |
552 | 0.6 * FREQ_MUL); | |
553 | retval = radio->ops->tune_freq(radio->core, &args); | |
554 | break; | |
555 | default: | |
556 | WARN(1, "Unexpected tuner function value\n"); | |
557 | retval = -EINVAL; | |
558 | } | |
559 | ||
560 | return retval; | |
561 | } | |
562 | static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio, | |
563 | enum si476x_func func) | |
564 | { | |
565 | int err; | |
566 | ||
567 | /* regcache_mark_dirty(radio->core->regmap); */ | |
568 | err = regcache_sync_region(radio->core->regmap, | |
569 | SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE, | |
570 | SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT); | |
571 | if (err < 0) | |
572 | return err; | |
573 | ||
574 | err = regcache_sync_region(radio->core->regmap, | |
575 | SI476X_PROP_AUDIO_DEEMPHASIS, | |
576 | SI476X_PROP_AUDIO_PWR_LINE_FILTER); | |
577 | if (err < 0) | |
578 | return err; | |
579 | ||
580 | err = regcache_sync_region(radio->core->regmap, | |
581 | SI476X_PROP_INT_CTL_ENABLE, | |
582 | SI476X_PROP_INT_CTL_ENABLE); | |
583 | if (err < 0) | |
584 | return err; | |
585 | ||
586 | /* | |
587 | * Is there any point in restoring SNR and the like | |
588 | * when switching between AM/FM? | |
589 | */ | |
590 | err = regcache_sync_region(radio->core->regmap, | |
591 | SI476X_PROP_VALID_MAX_TUNE_ERROR, | |
592 | SI476X_PROP_VALID_MAX_TUNE_ERROR); | |
593 | if (err < 0) | |
594 | return err; | |
595 | ||
596 | err = regcache_sync_region(radio->core->regmap, | |
597 | SI476X_PROP_VALID_SNR_THRESHOLD, | |
598 | SI476X_PROP_VALID_RSSI_THRESHOLD); | |
599 | if (err < 0) | |
600 | return err; | |
601 | ||
602 | if (func == SI476X_FUNC_FM_RECEIVER) { | |
603 | if (si476x_core_has_diversity(radio->core)) { | |
604 | err = si476x_core_cmd_fm_phase_diversity(radio->core, | |
605 | radio->core->diversity_mode); | |
606 | if (err < 0) | |
607 | return err; | |
608 | } | |
609 | ||
610 | err = regcache_sync_region(radio->core->regmap, | |
611 | SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, | |
612 | SI476X_PROP_FM_RDS_CONFIG); | |
613 | if (err < 0) | |
614 | return err; | |
615 | } | |
616 | ||
617 | return si476x_radio_init_vtable(radio, func); | |
618 | ||
619 | } | |
620 | ||
621 | static int si476x_radio_change_func(struct si476x_radio *radio, | |
622 | enum si476x_func func) | |
623 | { | |
624 | int err; | |
625 | bool soft; | |
626 | /* | |
627 | * Since power/up down is a very time consuming operation, | |
628 | * try to avoid doing it if the requested mode matches the one | |
629 | * the tuner is in | |
630 | */ | |
631 | if (func == radio->core->power_up_parameters.func) | |
632 | return 0; | |
633 | ||
634 | soft = true; | |
635 | err = si476x_core_stop(radio->core, soft); | |
636 | if (err < 0) { | |
637 | /* | |
638 | * OK, if the chip does not want to play nice let's | |
639 | * try to reset it in more brutal way | |
640 | */ | |
641 | soft = false; | |
642 | err = si476x_core_stop(radio->core, soft); | |
643 | if (err < 0) | |
644 | return err; | |
645 | } | |
646 | /* | |
647 | Set the desired radio tuner function | |
648 | */ | |
649 | radio->core->power_up_parameters.func = func; | |
650 | ||
651 | err = si476x_core_start(radio->core, soft); | |
652 | if (err < 0) | |
653 | return err; | |
654 | ||
655 | /* | |
656 | * No need to do the rest of manipulations for the bootlader | |
657 | * mode | |
658 | */ | |
659 | if (func != SI476X_FUNC_FM_RECEIVER && | |
660 | func != SI476X_FUNC_AM_RECEIVER) | |
661 | return err; | |
662 | ||
663 | return si476x_radio_do_post_powerup_init(radio, func); | |
664 | } | |
665 | ||
666 | static int si476x_radio_g_frequency(struct file *file, void *priv, | |
667 | struct v4l2_frequency *f) | |
668 | { | |
669 | int err; | |
670 | struct si476x_radio *radio = video_drvdata(file); | |
671 | ||
672 | if (f->tuner != 0 || | |
673 | f->type != V4L2_TUNER_RADIO) | |
674 | return -EINVAL; | |
675 | ||
676 | si476x_core_lock(radio->core); | |
677 | ||
678 | if (radio->ops->rsq_status) { | |
679 | struct si476x_rsq_status_report report; | |
680 | struct si476x_rsq_status_args args = { | |
681 | .primary = false, | |
682 | .rsqack = false, | |
683 | .attune = true, | |
684 | .cancel = false, | |
685 | .stcack = false, | |
686 | }; | |
687 | ||
688 | err = radio->ops->rsq_status(radio->core, &args, &report); | |
689 | if (!err) | |
690 | f->frequency = si476x_to_v4l2(radio->core, | |
691 | report.readfreq); | |
692 | } else { | |
693 | err = -EINVAL; | |
694 | } | |
695 | ||
696 | si476x_core_unlock(radio->core); | |
697 | ||
698 | return err; | |
699 | } | |
700 | ||
701 | static int si476x_radio_s_frequency(struct file *file, void *priv, | |
702 | const struct v4l2_frequency *f) | |
703 | { | |
704 | int err; | |
705 | u32 freq = f->frequency; | |
706 | struct si476x_tune_freq_args args; | |
707 | struct si476x_radio *radio = video_drvdata(file); | |
708 | ||
709 | const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh + | |
710 | si476x_bands[SI476X_BAND_FM].rangelow) / 2; | |
711 | const int band = (freq > midrange) ? | |
712 | SI476X_BAND_FM : SI476X_BAND_AM; | |
713 | const enum si476x_func func = (band == SI476X_BAND_AM) ? | |
714 | SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER; | |
715 | ||
716 | if (f->tuner != 0 || | |
717 | f->type != V4L2_TUNER_RADIO) | |
718 | return -EINVAL; | |
719 | ||
720 | si476x_core_lock(radio->core); | |
721 | ||
722 | freq = clamp(freq, | |
723 | si476x_bands[band].rangelow, | |
724 | si476x_bands[band].rangehigh); | |
725 | ||
726 | if (si476x_radio_freq_is_inside_of_the_band(freq, | |
727 | SI476X_BAND_AM) && | |
728 | (!si476x_core_has_am(radio->core) || | |
729 | si476x_core_is_a_secondary_tuner(radio->core))) { | |
730 | err = -EINVAL; | |
731 | goto unlock; | |
732 | } | |
733 | ||
734 | err = si476x_radio_change_func(radio, func); | |
735 | if (err < 0) | |
736 | goto unlock; | |
737 | ||
738 | args.zifsr = false; | |
739 | args.hd = false; | |
740 | args.injside = SI476X_INJSIDE_AUTO; | |
741 | args.freq = v4l2_to_si476x(radio->core, freq); | |
742 | args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE; | |
743 | args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO; | |
744 | args.antcap = 0; | |
745 | ||
746 | err = radio->ops->tune_freq(radio->core, &args); | |
747 | ||
748 | unlock: | |
749 | si476x_core_unlock(radio->core); | |
750 | return err; | |
751 | } | |
752 | ||
753 | static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv, | |
754 | const struct v4l2_hw_freq_seek *seek) | |
755 | { | |
756 | int err; | |
757 | enum si476x_func func; | |
758 | u32 rangelow, rangehigh; | |
759 | struct si476x_radio *radio = video_drvdata(file); | |
760 | ||
761 | if (file->f_flags & O_NONBLOCK) | |
762 | return -EAGAIN; | |
763 | ||
764 | if (seek->tuner != 0 || | |
765 | seek->type != V4L2_TUNER_RADIO) | |
766 | return -EINVAL; | |
767 | ||
768 | si476x_core_lock(radio->core); | |
769 | ||
770 | if (!seek->rangelow) { | |
771 | err = regmap_read(radio->core->regmap, | |
772 | SI476X_PROP_SEEK_BAND_BOTTOM, | |
773 | &rangelow); | |
774 | if (!err) | |
775 | rangelow = si476x_to_v4l2(radio->core, rangelow); | |
776 | else | |
777 | goto unlock; | |
778 | } | |
779 | if (!seek->rangehigh) { | |
780 | err = regmap_read(radio->core->regmap, | |
781 | SI476X_PROP_SEEK_BAND_TOP, | |
782 | &rangehigh); | |
783 | if (!err) | |
784 | rangehigh = si476x_to_v4l2(radio->core, rangehigh); | |
785 | else | |
786 | goto unlock; | |
787 | } | |
788 | ||
789 | if (rangelow > rangehigh) { | |
790 | err = -EINVAL; | |
791 | goto unlock; | |
792 | } | |
793 | ||
794 | if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, | |
795 | SI476X_BAND_FM)) { | |
796 | func = SI476X_FUNC_FM_RECEIVER; | |
797 | ||
798 | } else if (si476x_core_has_am(radio->core) && | |
799 | si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, | |
800 | SI476X_BAND_AM)) { | |
801 | func = SI476X_FUNC_AM_RECEIVER; | |
802 | } else { | |
803 | err = -EINVAL; | |
804 | goto unlock; | |
805 | } | |
806 | ||
807 | err = si476x_radio_change_func(radio, func); | |
808 | if (err < 0) | |
809 | goto unlock; | |
810 | ||
811 | if (seek->rangehigh) { | |
812 | err = regmap_write(radio->core->regmap, | |
813 | SI476X_PROP_SEEK_BAND_TOP, | |
814 | v4l2_to_si476x(radio->core, | |
815 | seek->rangehigh)); | |
816 | if (err) | |
817 | goto unlock; | |
818 | } | |
819 | if (seek->rangelow) { | |
820 | err = regmap_write(radio->core->regmap, | |
821 | SI476X_PROP_SEEK_BAND_BOTTOM, | |
822 | v4l2_to_si476x(radio->core, | |
823 | seek->rangelow)); | |
824 | if (err) | |
825 | goto unlock; | |
826 | } | |
827 | if (seek->spacing) { | |
828 | err = regmap_write(radio->core->regmap, | |
829 | SI476X_PROP_SEEK_FREQUENCY_SPACING, | |
830 | v4l2_to_si476x(radio->core, | |
831 | seek->spacing)); | |
832 | if (err) | |
833 | goto unlock; | |
834 | } | |
835 | ||
836 | err = radio->ops->seek_start(radio->core, | |
837 | seek->seek_upward, | |
838 | seek->wrap_around); | |
839 | unlock: | |
840 | si476x_core_unlock(radio->core); | |
841 | ||
842 | ||
843 | ||
844 | return err; | |
845 | } | |
846 | ||
847 | static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl) | |
848 | { | |
849 | int retval; | |
850 | struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); | |
851 | ||
852 | si476x_core_lock(radio->core); | |
853 | ||
854 | switch (ctrl->id) { | |
855 | case V4L2_CID_SI476X_INTERCHIP_LINK: | |
856 | if (si476x_core_has_diversity(radio->core)) { | |
857 | if (radio->ops->phase_diversity) { | |
858 | retval = radio->ops->phase_div_status(radio->core); | |
859 | if (retval < 0) | |
860 | break; | |
861 | ||
862 | ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval); | |
863 | retval = 0; | |
864 | break; | |
865 | } else { | |
866 | retval = -ENOTTY; | |
867 | break; | |
868 | } | |
869 | } | |
870 | retval = -EINVAL; | |
871 | break; | |
872 | default: | |
873 | retval = -EINVAL; | |
874 | break; | |
875 | } | |
876 | si476x_core_unlock(radio->core); | |
877 | return retval; | |
878 | ||
879 | } | |
880 | ||
881 | static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl) | |
882 | { | |
883 | int retval; | |
884 | enum si476x_phase_diversity_mode mode; | |
885 | struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); | |
886 | ||
887 | si476x_core_lock(radio->core); | |
888 | ||
889 | switch (ctrl->id) { | |
890 | case V4L2_CID_SI476X_HARMONICS_COUNT: | |
891 | retval = regmap_update_bits(radio->core->regmap, | |
892 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, | |
893 | SI476X_PROP_PWR_HARMONICS_MASK, | |
894 | ctrl->val); | |
895 | break; | |
896 | case V4L2_CID_POWER_LINE_FREQUENCY: | |
897 | switch (ctrl->val) { | |
898 | case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED: | |
899 | retval = regmap_update_bits(radio->core->regmap, | |
900 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, | |
901 | SI476X_PROP_PWR_ENABLE_MASK, | |
902 | 0); | |
903 | break; | |
904 | case V4L2_CID_POWER_LINE_FREQUENCY_50HZ: | |
905 | retval = regmap_update_bits(radio->core->regmap, | |
906 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, | |
907 | SI476X_PROP_PWR_GRID_MASK, | |
908 | SI476X_PROP_PWR_GRID_50HZ); | |
909 | break; | |
910 | case V4L2_CID_POWER_LINE_FREQUENCY_60HZ: | |
911 | retval = regmap_update_bits(radio->core->regmap, | |
912 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, | |
913 | SI476X_PROP_PWR_GRID_MASK, | |
914 | SI476X_PROP_PWR_GRID_60HZ); | |
915 | break; | |
916 | default: | |
917 | retval = -EINVAL; | |
918 | break; | |
919 | } | |
920 | break; | |
921 | case V4L2_CID_SI476X_RSSI_THRESHOLD: | |
922 | retval = regmap_write(radio->core->regmap, | |
923 | SI476X_PROP_VALID_RSSI_THRESHOLD, | |
924 | ctrl->val); | |
925 | break; | |
926 | case V4L2_CID_SI476X_SNR_THRESHOLD: | |
927 | retval = regmap_write(radio->core->regmap, | |
928 | SI476X_PROP_VALID_SNR_THRESHOLD, | |
929 | ctrl->val); | |
930 | break; | |
931 | case V4L2_CID_SI476X_MAX_TUNE_ERROR: | |
932 | retval = regmap_write(radio->core->regmap, | |
933 | SI476X_PROP_VALID_MAX_TUNE_ERROR, | |
934 | ctrl->val); | |
935 | break; | |
936 | case V4L2_CID_RDS_RECEPTION: | |
937 | /* | |
938 | * It looks like RDS related properties are | |
939 | * inaccesable when tuner is in AM mode, so cache the | |
940 | * changes | |
941 | */ | |
942 | if (si476x_core_is_in_am_receiver_mode(radio->core)) | |
943 | regcache_cache_only(radio->core->regmap, true); | |
944 | ||
945 | if (ctrl->val) { | |
946 | retval = regmap_write(radio->core->regmap, | |
947 | SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT, | |
948 | radio->core->rds_fifo_depth); | |
949 | if (retval < 0) | |
950 | break; | |
951 | ||
952 | if (radio->core->client->irq) { | |
953 | retval = regmap_write(radio->core->regmap, | |
954 | SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, | |
955 | SI476X_RDSRECV); | |
956 | if (retval < 0) | |
957 | break; | |
958 | } | |
959 | ||
960 | /* Drain RDS FIFO before enabling RDS processing */ | |
961 | retval = si476x_core_cmd_fm_rds_status(radio->core, | |
962 | false, | |
963 | true, | |
964 | true, | |
965 | NULL); | |
966 | if (retval < 0) | |
967 | break; | |
968 | ||
969 | retval = regmap_update_bits(radio->core->regmap, | |
970 | SI476X_PROP_FM_RDS_CONFIG, | |
971 | SI476X_PROP_RDSEN_MASK, | |
972 | SI476X_PROP_RDSEN); | |
973 | } else { | |
974 | retval = regmap_update_bits(radio->core->regmap, | |
975 | SI476X_PROP_FM_RDS_CONFIG, | |
976 | SI476X_PROP_RDSEN_MASK, | |
977 | !SI476X_PROP_RDSEN); | |
978 | } | |
979 | ||
980 | if (si476x_core_is_in_am_receiver_mode(radio->core)) | |
981 | regcache_cache_only(radio->core->regmap, false); | |
982 | break; | |
983 | case V4L2_CID_TUNE_DEEMPHASIS: | |
984 | retval = regmap_write(radio->core->regmap, | |
985 | SI476X_PROP_AUDIO_DEEMPHASIS, | |
986 | ctrl->val); | |
987 | break; | |
988 | ||
989 | case V4L2_CID_SI476X_DIVERSITY_MODE: | |
990 | mode = si476x_phase_diversity_idx_to_mode(ctrl->val); | |
991 | ||
992 | if (mode == radio->core->diversity_mode) { | |
993 | retval = 0; | |
994 | break; | |
995 | } | |
996 | ||
997 | if (si476x_core_is_in_am_receiver_mode(radio->core)) { | |
998 | /* | |
999 | * Diversity cannot be configured while tuner | |
1000 | * is in AM mode so save the changes and carry on. | |
1001 | */ | |
1002 | radio->core->diversity_mode = mode; | |
1003 | retval = 0; | |
1004 | } else { | |
1005 | retval = radio->ops->phase_diversity(radio->core, mode); | |
1006 | if (!retval) | |
1007 | radio->core->diversity_mode = mode; | |
1008 | } | |
1009 | break; | |
1010 | ||
1011 | default: | |
1012 | retval = -EINVAL; | |
1013 | break; | |
1014 | } | |
1015 | ||
1016 | si476x_core_unlock(radio->core); | |
1017 | ||
1018 | return retval; | |
1019 | } | |
1020 | ||
1021 | static int si476x_radio_g_chip_ident(struct file *file, void *fh, | |
1022 | struct v4l2_dbg_chip_ident *chip) | |
1023 | { | |
1024 | if (chip->match.type == V4L2_CHIP_MATCH_HOST && | |
1025 | v4l2_chip_match_host(&chip->match)) | |
1026 | return 0; | |
1027 | return -EINVAL; | |
1028 | } | |
1029 | ||
1030 | ||
1031 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1032 | static int si476x_radio_g_register(struct file *file, void *fh, | |
1033 | struct v4l2_dbg_register *reg) | |
1034 | { | |
1035 | int err; | |
1036 | unsigned int value; | |
1037 | struct si476x_radio *radio = video_drvdata(file); | |
1038 | ||
1039 | si476x_core_lock(radio->core); | |
1040 | reg->size = 2; | |
1041 | err = regmap_read(radio->core->regmap, | |
1042 | (unsigned int)reg->reg, &value); | |
1043 | reg->val = value; | |
1044 | si476x_core_unlock(radio->core); | |
1045 | ||
1046 | return err; | |
1047 | } | |
1048 | static int si476x_radio_s_register(struct file *file, void *fh, | |
1049 | const struct v4l2_dbg_register *reg) | |
1050 | { | |
1051 | ||
1052 | int err; | |
1053 | struct si476x_radio *radio = video_drvdata(file); | |
1054 | ||
1055 | si476x_core_lock(radio->core); | |
1056 | err = regmap_write(radio->core->regmap, | |
1057 | (unsigned int)reg->reg, | |
1058 | (unsigned int)reg->val); | |
1059 | si476x_core_unlock(radio->core); | |
1060 | ||
1061 | return err; | |
1062 | } | |
1063 | #endif | |
1064 | ||
1065 | static int si476x_radio_fops_open(struct file *file) | |
1066 | { | |
1067 | struct si476x_radio *radio = video_drvdata(file); | |
1068 | int err; | |
1069 | ||
1070 | err = v4l2_fh_open(file); | |
1071 | if (err) | |
1072 | return err; | |
1073 | ||
1074 | if (v4l2_fh_is_singular_file(file)) { | |
1075 | si476x_core_lock(radio->core); | |
1076 | err = si476x_core_set_power_state(radio->core, | |
1077 | SI476X_POWER_UP_FULL); | |
1078 | if (err < 0) | |
1079 | goto done; | |
1080 | ||
1081 | err = si476x_radio_do_post_powerup_init(radio, | |
1082 | radio->core->power_up_parameters.func); | |
1083 | if (err < 0) | |
1084 | goto power_down; | |
1085 | ||
1086 | err = si476x_radio_pretune(radio, | |
1087 | radio->core->power_up_parameters.func); | |
1088 | if (err < 0) | |
1089 | goto power_down; | |
1090 | ||
1091 | si476x_core_unlock(radio->core); | |
1092 | /*Must be done after si476x_core_unlock to prevent a deadlock*/ | |
1093 | v4l2_ctrl_handler_setup(&radio->ctrl_handler); | |
1094 | } | |
1095 | ||
1096 | return err; | |
1097 | ||
1098 | power_down: | |
1099 | si476x_core_set_power_state(radio->core, | |
1100 | SI476X_POWER_DOWN); | |
1101 | done: | |
1102 | si476x_core_unlock(radio->core); | |
1103 | v4l2_fh_release(file); | |
1104 | ||
1105 | return err; | |
1106 | } | |
1107 | ||
1108 | static int si476x_radio_fops_release(struct file *file) | |
1109 | { | |
1110 | int err; | |
1111 | struct si476x_radio *radio = video_drvdata(file); | |
1112 | ||
1113 | if (v4l2_fh_is_singular_file(file) && | |
1114 | atomic_read(&radio->core->is_alive)) | |
1115 | si476x_core_set_power_state(radio->core, | |
1116 | SI476X_POWER_DOWN); | |
1117 | ||
1118 | err = v4l2_fh_release(file); | |
1119 | ||
1120 | return err; | |
1121 | } | |
1122 | ||
1123 | static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf, | |
1124 | size_t count, loff_t *ppos) | |
1125 | { | |
1126 | ssize_t rval; | |
1127 | size_t fifo_len; | |
1128 | unsigned int copied; | |
1129 | ||
1130 | struct si476x_radio *radio = video_drvdata(file); | |
1131 | ||
1132 | /* block if no new data available */ | |
1133 | if (kfifo_is_empty(&radio->core->rds_fifo)) { | |
1134 | if (file->f_flags & O_NONBLOCK) | |
1135 | return -EWOULDBLOCK; | |
1136 | ||
1137 | rval = wait_event_interruptible(radio->core->rds_read_queue, | |
1138 | (!kfifo_is_empty(&radio->core->rds_fifo) || | |
1139 | !atomic_read(&radio->core->is_alive))); | |
1140 | if (rval < 0) | |
1141 | return -EINTR; | |
1142 | ||
1143 | if (!atomic_read(&radio->core->is_alive)) | |
1144 | return -ENODEV; | |
1145 | } | |
1146 | ||
1147 | fifo_len = kfifo_len(&radio->core->rds_fifo); | |
1148 | ||
1149 | if (kfifo_to_user(&radio->core->rds_fifo, buf, | |
1150 | min(fifo_len, count), | |
1151 | &copied) != 0) { | |
1152 | dev_warn(&radio->videodev.dev, | |
1153 | "Error during FIFO to userspace copy\n"); | |
1154 | rval = -EIO; | |
1155 | } else { | |
1156 | rval = (ssize_t)copied; | |
1157 | } | |
1158 | ||
1159 | return rval; | |
1160 | } | |
1161 | ||
1162 | static unsigned int si476x_radio_fops_poll(struct file *file, | |
1163 | struct poll_table_struct *pts) | |
1164 | { | |
1165 | struct si476x_radio *radio = video_drvdata(file); | |
1166 | unsigned long req_events = poll_requested_events(pts); | |
1167 | unsigned int err = v4l2_ctrl_poll(file, pts); | |
1168 | ||
1169 | if (req_events & (POLLIN | POLLRDNORM)) { | |
1170 | if (atomic_read(&radio->core->is_alive)) | |
1171 | poll_wait(file, &radio->core->rds_read_queue, pts); | |
1172 | ||
1173 | if (!atomic_read(&radio->core->is_alive)) | |
1174 | err = POLLHUP; | |
1175 | ||
1176 | if (!kfifo_is_empty(&radio->core->rds_fifo)) | |
1177 | err = POLLIN | POLLRDNORM; | |
1178 | } | |
1179 | ||
1180 | return err; | |
1181 | } | |
1182 | ||
1183 | static const struct v4l2_file_operations si476x_fops = { | |
1184 | .owner = THIS_MODULE, | |
1185 | .read = si476x_radio_fops_read, | |
1186 | .poll = si476x_radio_fops_poll, | |
1187 | .unlocked_ioctl = video_ioctl2, | |
1188 | .open = si476x_radio_fops_open, | |
1189 | .release = si476x_radio_fops_release, | |
1190 | }; | |
1191 | ||
1192 | ||
1193 | static const struct v4l2_ioctl_ops si4761_ioctl_ops = { | |
1194 | .vidioc_querycap = si476x_radio_querycap, | |
1195 | .vidioc_g_tuner = si476x_radio_g_tuner, | |
1196 | .vidioc_s_tuner = si476x_radio_s_tuner, | |
1197 | ||
1198 | .vidioc_g_frequency = si476x_radio_g_frequency, | |
1199 | .vidioc_s_frequency = si476x_radio_s_frequency, | |
1200 | .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek, | |
1201 | .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands, | |
1202 | ||
1203 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, | |
1204 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
1205 | ||
1206 | .vidioc_g_chip_ident = si476x_radio_g_chip_ident, | |
1207 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1208 | .vidioc_g_register = si476x_radio_g_register, | |
1209 | .vidioc_s_register = si476x_radio_s_register, | |
1210 | #endif | |
1211 | }; | |
1212 | ||
1213 | ||
1214 | static const struct video_device si476x_viddev_template = { | |
1215 | .fops = &si476x_fops, | |
1216 | .name = DRIVER_NAME, | |
1217 | .release = video_device_release_empty, | |
1218 | }; | |
1219 | ||
1220 | ||
1221 | ||
1222 | static ssize_t si476x_radio_read_acf_blob(struct file *file, | |
1223 | char __user *user_buf, | |
1224 | size_t count, loff_t *ppos) | |
1225 | { | |
1226 | int err; | |
1227 | struct si476x_radio *radio = file->private_data; | |
1228 | struct si476x_acf_status_report report; | |
1229 | ||
1230 | si476x_core_lock(radio->core); | |
1231 | if (radio->ops->acf_status) | |
1232 | err = radio->ops->acf_status(radio->core, &report); | |
1233 | else | |
1234 | err = -ENOENT; | |
1235 | si476x_core_unlock(radio->core); | |
1236 | ||
1237 | if (err < 0) | |
1238 | return err; | |
1239 | ||
1240 | return simple_read_from_buffer(user_buf, count, ppos, &report, | |
1241 | sizeof(report)); | |
1242 | } | |
1243 | ||
1244 | static const struct file_operations radio_acf_fops = { | |
1245 | .open = simple_open, | |
1246 | .llseek = default_llseek, | |
1247 | .read = si476x_radio_read_acf_blob, | |
1248 | }; | |
1249 | ||
1250 | static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file, | |
1251 | char __user *user_buf, | |
1252 | size_t count, loff_t *ppos) | |
1253 | { | |
1254 | int err; | |
1255 | struct si476x_radio *radio = file->private_data; | |
1256 | struct si476x_rds_blockcount_report report; | |
1257 | ||
1258 | si476x_core_lock(radio->core); | |
1259 | if (radio->ops->rds_blckcnt) | |
1260 | err = radio->ops->rds_blckcnt(radio->core, true, | |
1261 | &report); | |
1262 | else | |
1263 | err = -ENOENT; | |
1264 | si476x_core_unlock(radio->core); | |
1265 | ||
1266 | if (err < 0) | |
1267 | return err; | |
1268 | ||
1269 | return simple_read_from_buffer(user_buf, count, ppos, &report, | |
1270 | sizeof(report)); | |
1271 | } | |
1272 | ||
1273 | static const struct file_operations radio_rds_blckcnt_fops = { | |
1274 | .open = simple_open, | |
1275 | .llseek = default_llseek, | |
1276 | .read = si476x_radio_read_rds_blckcnt_blob, | |
1277 | }; | |
1278 | ||
1279 | static ssize_t si476x_radio_read_agc_blob(struct file *file, | |
1280 | char __user *user_buf, | |
1281 | size_t count, loff_t *ppos) | |
1282 | { | |
1283 | int err; | |
1284 | struct si476x_radio *radio = file->private_data; | |
1285 | struct si476x_agc_status_report report; | |
1286 | ||
1287 | si476x_core_lock(radio->core); | |
1288 | if (radio->ops->rds_blckcnt) | |
1289 | err = radio->ops->agc_status(radio->core, &report); | |
1290 | else | |
1291 | err = -ENOENT; | |
1292 | si476x_core_unlock(radio->core); | |
1293 | ||
1294 | if (err < 0) | |
1295 | return err; | |
1296 | ||
1297 | return simple_read_from_buffer(user_buf, count, ppos, &report, | |
1298 | sizeof(report)); | |
1299 | } | |
1300 | ||
1301 | static const struct file_operations radio_agc_fops = { | |
1302 | .open = simple_open, | |
1303 | .llseek = default_llseek, | |
1304 | .read = si476x_radio_read_agc_blob, | |
1305 | }; | |
1306 | ||
1307 | static ssize_t si476x_radio_read_rsq_blob(struct file *file, | |
1308 | char __user *user_buf, | |
1309 | size_t count, loff_t *ppos) | |
1310 | { | |
1311 | int err; | |
1312 | struct si476x_radio *radio = file->private_data; | |
1313 | struct si476x_rsq_status_report report; | |
1314 | struct si476x_rsq_status_args args = { | |
1315 | .primary = false, | |
1316 | .rsqack = false, | |
1317 | .attune = false, | |
1318 | .cancel = false, | |
1319 | .stcack = false, | |
1320 | }; | |
1321 | ||
1322 | si476x_core_lock(radio->core); | |
1323 | if (radio->ops->rds_blckcnt) | |
1324 | err = radio->ops->rsq_status(radio->core, &args, &report); | |
1325 | else | |
1326 | err = -ENOENT; | |
1327 | si476x_core_unlock(radio->core); | |
1328 | ||
1329 | if (err < 0) | |
1330 | return err; | |
1331 | ||
1332 | return simple_read_from_buffer(user_buf, count, ppos, &report, | |
1333 | sizeof(report)); | |
1334 | } | |
1335 | ||
1336 | static const struct file_operations radio_rsq_fops = { | |
1337 | .open = simple_open, | |
1338 | .llseek = default_llseek, | |
1339 | .read = si476x_radio_read_rsq_blob, | |
1340 | }; | |
1341 | ||
1342 | static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file, | |
1343 | char __user *user_buf, | |
1344 | size_t count, loff_t *ppos) | |
1345 | { | |
1346 | int err; | |
1347 | struct si476x_radio *radio = file->private_data; | |
1348 | struct si476x_rsq_status_report report; | |
1349 | struct si476x_rsq_status_args args = { | |
1350 | .primary = true, | |
1351 | .rsqack = false, | |
1352 | .attune = false, | |
1353 | .cancel = false, | |
1354 | .stcack = false, | |
1355 | }; | |
1356 | ||
1357 | si476x_core_lock(radio->core); | |
1358 | if (radio->ops->rds_blckcnt) | |
1359 | err = radio->ops->rsq_status(radio->core, &args, &report); | |
1360 | else | |
1361 | err = -ENOENT; | |
1362 | si476x_core_unlock(radio->core); | |
1363 | ||
1364 | if (err < 0) | |
1365 | return err; | |
1366 | ||
1367 | return simple_read_from_buffer(user_buf, count, ppos, &report, | |
1368 | sizeof(report)); | |
1369 | } | |
1370 | ||
1371 | static const struct file_operations radio_rsq_primary_fops = { | |
1372 | .open = simple_open, | |
1373 | .llseek = default_llseek, | |
1374 | .read = si476x_radio_read_rsq_primary_blob, | |
1375 | }; | |
1376 | ||
1377 | ||
1378 | static int si476x_radio_init_debugfs(struct si476x_radio *radio) | |
1379 | { | |
1380 | struct dentry *dentry; | |
1381 | int ret; | |
1382 | ||
1383 | dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); | |
1384 | if (IS_ERR(dentry)) { | |
1385 | ret = PTR_ERR(dentry); | |
1386 | goto exit; | |
1387 | } | |
1388 | radio->debugfs = dentry; | |
1389 | ||
1390 | dentry = debugfs_create_file("acf", S_IRUGO, | |
1391 | radio->debugfs, radio, &radio_acf_fops); | |
1392 | if (IS_ERR(dentry)) { | |
1393 | ret = PTR_ERR(dentry); | |
1394 | goto cleanup; | |
1395 | } | |
1396 | ||
1397 | dentry = debugfs_create_file("rds_blckcnt", S_IRUGO, | |
1398 | radio->debugfs, radio, | |
1399 | &radio_rds_blckcnt_fops); | |
1400 | if (IS_ERR(dentry)) { | |
1401 | ret = PTR_ERR(dentry); | |
1402 | goto cleanup; | |
1403 | } | |
1404 | ||
1405 | dentry = debugfs_create_file("agc", S_IRUGO, | |
1406 | radio->debugfs, radio, &radio_agc_fops); | |
1407 | if (IS_ERR(dentry)) { | |
1408 | ret = PTR_ERR(dentry); | |
1409 | goto cleanup; | |
1410 | } | |
1411 | ||
1412 | dentry = debugfs_create_file("rsq", S_IRUGO, | |
1413 | radio->debugfs, radio, &radio_rsq_fops); | |
1414 | if (IS_ERR(dentry)) { | |
1415 | ret = PTR_ERR(dentry); | |
1416 | goto cleanup; | |
1417 | } | |
1418 | ||
1419 | dentry = debugfs_create_file("rsq_primary", S_IRUGO, | |
1420 | radio->debugfs, radio, | |
1421 | &radio_rsq_primary_fops); | |
1422 | if (IS_ERR(dentry)) { | |
1423 | ret = PTR_ERR(dentry); | |
1424 | goto cleanup; | |
1425 | } | |
1426 | ||
1427 | return 0; | |
1428 | cleanup: | |
1429 | debugfs_remove_recursive(radio->debugfs); | |
1430 | exit: | |
1431 | return ret; | |
1432 | } | |
1433 | ||
1434 | ||
1435 | static int si476x_radio_add_new_custom(struct si476x_radio *radio, | |
1436 | enum si476x_ctrl_idx idx) | |
1437 | { | |
1438 | int rval; | |
1439 | struct v4l2_ctrl *ctrl; | |
1440 | ||
1441 | ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler, | |
1442 | &si476x_ctrls[idx], | |
1443 | NULL); | |
1444 | rval = radio->ctrl_handler.error; | |
1445 | if (ctrl == NULL && rval) | |
1446 | dev_err(radio->v4l2dev.dev, | |
1447 | "Could not initialize '%s' control %d\n", | |
1448 | si476x_ctrls[idx].name, rval); | |
1449 | ||
1450 | return rval; | |
1451 | } | |
1452 | ||
1453 | static int si476x_radio_probe(struct platform_device *pdev) | |
1454 | { | |
1455 | int rval; | |
1456 | struct si476x_radio *radio; | |
1457 | struct v4l2_ctrl *ctrl; | |
1458 | ||
1459 | static atomic_t instance = ATOMIC_INIT(0); | |
1460 | ||
1461 | radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL); | |
1462 | if (!radio) | |
1463 | return -ENOMEM; | |
1464 | ||
1465 | radio->core = i2c_mfd_cell_to_core(&pdev->dev); | |
1466 | ||
1467 | v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance); | |
1468 | ||
1469 | rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev); | |
1470 | if (rval) { | |
1471 | dev_err(&pdev->dev, "Cannot register v4l2_device.\n"); | |
1472 | return rval; | |
1473 | } | |
1474 | ||
1475 | memcpy(&radio->videodev, &si476x_viddev_template, | |
1476 | sizeof(struct video_device)); | |
1477 | ||
1478 | radio->videodev.v4l2_dev = &radio->v4l2dev; | |
1479 | radio->videodev.ioctl_ops = &si4761_ioctl_ops; | |
1480 | ||
1481 | video_set_drvdata(&radio->videodev, radio); | |
1482 | platform_set_drvdata(pdev, radio); | |
1483 | ||
1484 | set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags); | |
1485 | ||
1486 | radio->v4l2dev.ctrl_handler = &radio->ctrl_handler; | |
1487 | v4l2_ctrl_handler_init(&radio->ctrl_handler, | |
1488 | 1 + ARRAY_SIZE(si476x_ctrls)); | |
1489 | ||
1490 | if (si476x_core_has_am(radio->core)) { | |
1491 | ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, | |
1492 | &si476x_ctrl_ops, | |
1493 | V4L2_CID_POWER_LINE_FREQUENCY, | |
1494 | V4L2_CID_POWER_LINE_FREQUENCY_60HZ, | |
1495 | 0, 0); | |
1496 | rval = radio->ctrl_handler.error; | |
1497 | if (ctrl == NULL && rval) { | |
1498 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n", | |
1499 | rval); | |
1500 | goto exit; | |
1501 | } | |
1502 | ||
1503 | rval = si476x_radio_add_new_custom(radio, | |
1504 | SI476X_IDX_HARMONICS_COUNT); | |
1505 | if (rval < 0) | |
1506 | goto exit; | |
1507 | } | |
1508 | ||
1509 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD); | |
1510 | if (rval < 0) | |
1511 | goto exit; | |
1512 | ||
1513 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD); | |
1514 | if (rval < 0) | |
1515 | goto exit; | |
1516 | ||
1517 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR); | |
1518 | if (rval < 0) | |
1519 | goto exit; | |
1520 | ||
1521 | ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, | |
1522 | &si476x_ctrl_ops, | |
1523 | V4L2_CID_TUNE_DEEMPHASIS, | |
1524 | V4L2_DEEMPHASIS_75_uS, 0, 0); | |
1525 | rval = radio->ctrl_handler.error; | |
1526 | if (ctrl == NULL && rval) { | |
1527 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n", | |
1528 | rval); | |
1529 | goto exit; | |
1530 | } | |
1531 | ||
1532 | ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops, | |
1533 | V4L2_CID_RDS_RECEPTION, | |
1534 | 0, 1, 1, 1); | |
1535 | rval = radio->ctrl_handler.error; | |
1536 | if (ctrl == NULL && rval) { | |
1537 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n", | |
1538 | rval); | |
1539 | goto exit; | |
1540 | } | |
1541 | ||
1542 | if (si476x_core_has_diversity(radio->core)) { | |
1543 | si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def = | |
1544 | si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode); | |
1545 | si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); | |
1546 | if (rval < 0) | |
1547 | goto exit; | |
1548 | ||
1549 | si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK); | |
1550 | if (rval < 0) | |
1551 | goto exit; | |
1552 | } | |
1553 | ||
1554 | /* register video device */ | |
1555 | rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1); | |
1556 | if (rval < 0) { | |
1557 | dev_err(&pdev->dev, "Could not register video device\n"); | |
1558 | goto exit; | |
1559 | } | |
1560 | ||
1561 | rval = si476x_radio_init_debugfs(radio); | |
1562 | if (rval < 0) { | |
1563 | dev_err(&pdev->dev, "Could not creat debugfs interface\n"); | |
1564 | goto exit; | |
1565 | } | |
1566 | ||
1567 | return 0; | |
1568 | exit: | |
1569 | v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); | |
1570 | return rval; | |
1571 | } | |
1572 | ||
1573 | static int si476x_radio_remove(struct platform_device *pdev) | |
1574 | { | |
1575 | struct si476x_radio *radio = platform_get_drvdata(pdev); | |
1576 | ||
1577 | v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); | |
1578 | video_unregister_device(&radio->videodev); | |
1579 | v4l2_device_unregister(&radio->v4l2dev); | |
1580 | debugfs_remove_recursive(radio->debugfs); | |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | MODULE_ALIAS("platform:si476x-radio"); | |
1586 | ||
1587 | static struct platform_driver si476x_radio_driver = { | |
1588 | .driver = { | |
1589 | .name = DRIVER_NAME, | |
1590 | .owner = THIS_MODULE, | |
1591 | }, | |
1592 | .probe = si476x_radio_probe, | |
1593 | .remove = si476x_radio_remove, | |
1594 | }; | |
1595 | module_platform_driver(si476x_radio_driver); | |
1596 | ||
1597 | MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); | |
1598 | MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); | |
1599 | MODULE_LICENSE("GPL"); |