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) (0x80 & (status)) 48 49 #define DRIVER_NAME "si476x-radio" 50 #define DRIVER_CARD "SI476x AM/FM Receiver" 51 52 enum si476x_freq_bands { 53 SI476X_BAND_FM, 54 SI476X_BAND_AM, 55 }; 56 57 static const struct v4l2_frequency_band si476x_bands[] = { 58 [SI476X_BAND_FM] = { 59 .type = V4L2_TUNER_RADIO, 60 .index = SI476X_BAND_FM, 61 .capability = V4L2_TUNER_CAP_LOW 62 | V4L2_TUNER_CAP_STEREO 63 | V4L2_TUNER_CAP_RDS 64 | V4L2_TUNER_CAP_RDS_BLOCK_IO 65 | V4L2_TUNER_CAP_FREQ_BANDS, 66 .rangelow = 64 * FREQ_MUL, 67 .rangehigh = 108 * FREQ_MUL, 68 .modulation = V4L2_BAND_MODULATION_FM, 69 }, 70 [SI476X_BAND_AM] = { 71 .type = V4L2_TUNER_RADIO, 72 .index = SI476X_BAND_AM, 73 .capability = V4L2_TUNER_CAP_LOW 74 | V4L2_TUNER_CAP_FREQ_BANDS, 75 .rangelow = 0.52 * FREQ_MUL, 76 .rangehigh = 30 * FREQ_MUL, 77 .modulation = V4L2_BAND_MODULATION_AM, 78 }, 79 }; 80 81 static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) 82 { 83 return freq >= si476x_bands[band].rangelow && 84 freq <= si476x_bands[band].rangehigh; 85 } 86 87 static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, 88 int band) 89 { 90 return low >= si476x_bands[band].rangelow && 91 high <= si476x_bands[band].rangehigh; 92 } 93 94 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); 95 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); 96 97 enum phase_diversity_modes_idx { 98 SI476X_IDX_PHDIV_DISABLED, 99 SI476X_IDX_PHDIV_PRIMARY_COMBINING, 100 SI476X_IDX_PHDIV_PRIMARY_ANTENNA, 101 SI476X_IDX_PHDIV_SECONDARY_ANTENNA, 102 SI476X_IDX_PHDIV_SECONDARY_COMBINING, 103 }; 104 105 static const char * const phase_diversity_modes[] = { 106 [SI476X_IDX_PHDIV_DISABLED] = "Disabled", 107 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", 108 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", 109 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", 110 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", 111 }; 112 113 static inline enum phase_diversity_modes_idx 114 si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) 115 { 116 switch (mode) { 117 default: /* FALLTHROUGH */ 118 case SI476X_PHDIV_DISABLED: 119 return SI476X_IDX_PHDIV_DISABLED; 120 case SI476X_PHDIV_PRIMARY_COMBINING: 121 return SI476X_IDX_PHDIV_PRIMARY_COMBINING; 122 case SI476X_PHDIV_PRIMARY_ANTENNA: 123 return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; 124 case SI476X_PHDIV_SECONDARY_ANTENNA: 125 return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; 126 case SI476X_PHDIV_SECONDARY_COMBINING: 127 return SI476X_IDX_PHDIV_SECONDARY_COMBINING; 128 } 129 } 130 131 static inline enum si476x_phase_diversity_mode 132 si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) 133 { 134 static const int idx_to_value[] = { 135 [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, 136 [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, 137 [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, 138 [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, 139 [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, 140 }; 141 142 return idx_to_value[idx]; 143 } 144 145 static const struct v4l2_ctrl_ops si476x_ctrl_ops = { 146 .g_volatile_ctrl = si476x_radio_g_volatile_ctrl, 147 .s_ctrl = si476x_radio_s_ctrl, 148 }; 149 150 151 enum si476x_ctrl_idx { 152 SI476X_IDX_RSSI_THRESHOLD, 153 SI476X_IDX_SNR_THRESHOLD, 154 SI476X_IDX_MAX_TUNE_ERROR, 155 SI476X_IDX_HARMONICS_COUNT, 156 SI476X_IDX_DIVERSITY_MODE, 157 SI476X_IDX_INTERCHIP_LINK, 158 }; 159 static struct v4l2_ctrl_config si476x_ctrls[] = { 160 161 /** 162 * SI476X during its station seeking(or tuning) process uses several 163 * parameters to detrmine if "the station" is valid: 164 * 165 * - Signal's SNR(in dBuV) must be lower than 166 * #V4L2_CID_SI476X_SNR_THRESHOLD 167 * - Signal's RSSI(in dBuV) must be greater than 168 * #V4L2_CID_SI476X_RSSI_THRESHOLD 169 * - Signal's frequency deviation(in units of 2ppm) must not be 170 * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR 171 */ 172 [SI476X_IDX_RSSI_THRESHOLD] = { 173 .ops = &si476x_ctrl_ops, 174 .id = V4L2_CID_SI476X_RSSI_THRESHOLD, 175 .name = "Valid RSSI Threshold", 176 .type = V4L2_CTRL_TYPE_INTEGER, 177 .min = -128, 178 .max = 127, 179 .step = 1, 180 }, 181 [SI476X_IDX_SNR_THRESHOLD] = { 182 .ops = &si476x_ctrl_ops, 183 .id = V4L2_CID_SI476X_SNR_THRESHOLD, 184 .type = V4L2_CTRL_TYPE_INTEGER, 185 .name = "Valid SNR Threshold", 186 .min = -128, 187 .max = 127, 188 .step = 1, 189 }, 190 [SI476X_IDX_MAX_TUNE_ERROR] = { 191 .ops = &si476x_ctrl_ops, 192 .id = V4L2_CID_SI476X_MAX_TUNE_ERROR, 193 .type = V4L2_CTRL_TYPE_INTEGER, 194 .name = "Max Tune Errors", 195 .min = 0, 196 .max = 126 * 2, 197 .step = 2, 198 }, 199 200 /** 201 * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics 202 * built-in power-line noise supression filter is to reject 203 * during AM-mode operation. 204 */ 205 [SI476X_IDX_HARMONICS_COUNT] = { 206 .ops = &si476x_ctrl_ops, 207 .id = V4L2_CID_SI476X_HARMONICS_COUNT, 208 .type = V4L2_CTRL_TYPE_INTEGER, 209 210 .name = "Count of Harmonics to Reject", 211 .min = 0, 212 .max = 20, 213 .step = 1, 214 }, 215 216 /** 217 * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which 218 * two tuners working in diversity mode are to work in. 219 * 220 * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled 221 * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is 222 * on, primary tuner's antenna is the main one. 223 * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is 224 * off, primary tuner's antenna is the main one. 225 * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is 226 * off, secondary tuner's antenna is the main one. 227 * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is 228 * on, secondary tuner's antenna is the main one. 229 */ 230 [SI476X_IDX_DIVERSITY_MODE] = { 231 .ops = &si476x_ctrl_ops, 232 .id = V4L2_CID_SI476X_DIVERSITY_MODE, 233 .type = V4L2_CTRL_TYPE_MENU, 234 .name = "Phase Diversity Mode", 235 .qmenu = phase_diversity_modes, 236 .min = 0, 237 .max = ARRAY_SIZE(phase_diversity_modes) - 1, 238 }, 239 240 /** 241 * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in 242 * diversity mode indicator. Allows user to determine if two 243 * chips working in diversity mode have established a link 244 * between each other and if the system as a whole uses 245 * signals from both antennas to receive FM radio. 246 */ 247 [SI476X_IDX_INTERCHIP_LINK] = { 248 .ops = &si476x_ctrl_ops, 249 .id = V4L2_CID_SI476X_INTERCHIP_LINK, 250 .type = V4L2_CTRL_TYPE_BOOLEAN, 251 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, 252 .name = "Inter-Chip Link", 253 .min = 0, 254 .max = 1, 255 .step = 1, 256 }, 257 }; 258 259 struct si476x_radio; 260 261 /** 262 * struct si476x_radio_ops - vtable of tuner functions 263 * 264 * This table holds pointers to functions implementing particular 265 * operations depending on the mode in which the tuner chip was 266 * configured to start in. If the function is not supported 267 * corresponding element is set to #NULL. 268 * 269 * @tune_freq: Tune chip to a specific frequency 270 * @seek_start: Star station seeking 271 * @rsq_status: Get Received Signal Quality(RSQ) status 272 * @rds_blckcnt: Get received RDS blocks count 273 * @phase_diversity: Change phase diversity mode of the tuner 274 * @phase_div_status: Get phase diversity mode status 275 * @acf_status: Get the status of Automatically Controlled 276 * Features(ACF) 277 * @agc_status: Get Automatic Gain Control(AGC) status 278 */ 279 struct si476x_radio_ops { 280 int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *); 281 int (*seek_start)(struct si476x_core *, bool, bool); 282 int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *, 283 struct si476x_rsq_status_report *); 284 int (*rds_blckcnt)(struct si476x_core *, bool, 285 struct si476x_rds_blockcount_report *); 286 287 int (*phase_diversity)(struct si476x_core *, 288 enum si476x_phase_diversity_mode); 289 int (*phase_div_status)(struct si476x_core *); 290 int (*acf_status)(struct si476x_core *, 291 struct si476x_acf_status_report *); 292 int (*agc_status)(struct si476x_core *, 293 struct si476x_agc_status_report *); 294 }; 295 296 /** 297 * struct si476x_radio - radio device 298 * 299 * @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 #ifdef CONFIG_VIDEO_ADV_DEBUG 1022 static int si476x_radio_g_register(struct file *file, void *fh, 1023 struct v4l2_dbg_register *reg) 1024 { 1025 int err; 1026 unsigned int value; 1027 struct si476x_radio *radio = video_drvdata(file); 1028 1029 si476x_core_lock(radio->core); 1030 reg->size = 2; 1031 err = regmap_read(radio->core->regmap, 1032 (unsigned int)reg->reg, &value); 1033 reg->val = value; 1034 si476x_core_unlock(radio->core); 1035 1036 return err; 1037 } 1038 static int si476x_radio_s_register(struct file *file, void *fh, 1039 const struct v4l2_dbg_register *reg) 1040 { 1041 1042 int err; 1043 struct si476x_radio *radio = video_drvdata(file); 1044 1045 si476x_core_lock(radio->core); 1046 err = regmap_write(radio->core->regmap, 1047 (unsigned int)reg->reg, 1048 (unsigned int)reg->val); 1049 si476x_core_unlock(radio->core); 1050 1051 return err; 1052 } 1053 #endif 1054 1055 static int si476x_radio_fops_open(struct file *file) 1056 { 1057 struct si476x_radio *radio = video_drvdata(file); 1058 int err; 1059 1060 err = v4l2_fh_open(file); 1061 if (err) 1062 return err; 1063 1064 if (v4l2_fh_is_singular_file(file)) { 1065 si476x_core_lock(radio->core); 1066 err = si476x_core_set_power_state(radio->core, 1067 SI476X_POWER_UP_FULL); 1068 if (err < 0) 1069 goto done; 1070 1071 err = si476x_radio_do_post_powerup_init(radio, 1072 radio->core->power_up_parameters.func); 1073 if (err < 0) 1074 goto power_down; 1075 1076 err = si476x_radio_pretune(radio, 1077 radio->core->power_up_parameters.func); 1078 if (err < 0) 1079 goto power_down; 1080 1081 si476x_core_unlock(radio->core); 1082 /*Must be done after si476x_core_unlock to prevent a deadlock*/ 1083 v4l2_ctrl_handler_setup(&radio->ctrl_handler); 1084 } 1085 1086 return err; 1087 1088 power_down: 1089 si476x_core_set_power_state(radio->core, 1090 SI476X_POWER_DOWN); 1091 done: 1092 si476x_core_unlock(radio->core); 1093 v4l2_fh_release(file); 1094 1095 return err; 1096 } 1097 1098 static int si476x_radio_fops_release(struct file *file) 1099 { 1100 int err; 1101 struct si476x_radio *radio = video_drvdata(file); 1102 1103 if (v4l2_fh_is_singular_file(file) && 1104 atomic_read(&radio->core->is_alive)) 1105 si476x_core_set_power_state(radio->core, 1106 SI476X_POWER_DOWN); 1107 1108 err = v4l2_fh_release(file); 1109 1110 return err; 1111 } 1112 1113 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf, 1114 size_t count, loff_t *ppos) 1115 { 1116 ssize_t rval; 1117 size_t fifo_len; 1118 unsigned int copied; 1119 1120 struct si476x_radio *radio = video_drvdata(file); 1121 1122 /* block if no new data available */ 1123 if (kfifo_is_empty(&radio->core->rds_fifo)) { 1124 if (file->f_flags & O_NONBLOCK) 1125 return -EWOULDBLOCK; 1126 1127 rval = wait_event_interruptible(radio->core->rds_read_queue, 1128 (!kfifo_is_empty(&radio->core->rds_fifo) || 1129 !atomic_read(&radio->core->is_alive))); 1130 if (rval < 0) 1131 return -EINTR; 1132 1133 if (!atomic_read(&radio->core->is_alive)) 1134 return -ENODEV; 1135 } 1136 1137 fifo_len = kfifo_len(&radio->core->rds_fifo); 1138 1139 if (kfifo_to_user(&radio->core->rds_fifo, buf, 1140 min(fifo_len, count), 1141 &copied) != 0) { 1142 dev_warn(&radio->videodev.dev, 1143 "Error during FIFO to userspace copy\n"); 1144 rval = -EIO; 1145 } else { 1146 rval = (ssize_t)copied; 1147 } 1148 1149 return rval; 1150 } 1151 1152 static unsigned int si476x_radio_fops_poll(struct file *file, 1153 struct poll_table_struct *pts) 1154 { 1155 struct si476x_radio *radio = video_drvdata(file); 1156 unsigned long req_events = poll_requested_events(pts); 1157 unsigned int err = v4l2_ctrl_poll(file, pts); 1158 1159 if (req_events & (POLLIN | POLLRDNORM)) { 1160 if (atomic_read(&radio->core->is_alive)) 1161 poll_wait(file, &radio->core->rds_read_queue, pts); 1162 1163 if (!atomic_read(&radio->core->is_alive)) 1164 err = POLLHUP; 1165 1166 if (!kfifo_is_empty(&radio->core->rds_fifo)) 1167 err = POLLIN | POLLRDNORM; 1168 } 1169 1170 return err; 1171 } 1172 1173 static const struct v4l2_file_operations si476x_fops = { 1174 .owner = THIS_MODULE, 1175 .read = si476x_radio_fops_read, 1176 .poll = si476x_radio_fops_poll, 1177 .unlocked_ioctl = video_ioctl2, 1178 .open = si476x_radio_fops_open, 1179 .release = si476x_radio_fops_release, 1180 }; 1181 1182 1183 static const struct v4l2_ioctl_ops si4761_ioctl_ops = { 1184 .vidioc_querycap = si476x_radio_querycap, 1185 .vidioc_g_tuner = si476x_radio_g_tuner, 1186 .vidioc_s_tuner = si476x_radio_s_tuner, 1187 1188 .vidioc_g_frequency = si476x_radio_g_frequency, 1189 .vidioc_s_frequency = si476x_radio_s_frequency, 1190 .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek, 1191 .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands, 1192 1193 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1194 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1195 1196 #ifdef CONFIG_VIDEO_ADV_DEBUG 1197 .vidioc_g_register = si476x_radio_g_register, 1198 .vidioc_s_register = si476x_radio_s_register, 1199 #endif 1200 }; 1201 1202 1203 static const struct video_device si476x_viddev_template = { 1204 .fops = &si476x_fops, 1205 .name = DRIVER_NAME, 1206 .release = video_device_release_empty, 1207 }; 1208 1209 1210 1211 static ssize_t si476x_radio_read_acf_blob(struct file *file, 1212 char __user *user_buf, 1213 size_t count, loff_t *ppos) 1214 { 1215 int err; 1216 struct si476x_radio *radio = file->private_data; 1217 struct si476x_acf_status_report report; 1218 1219 si476x_core_lock(radio->core); 1220 if (radio->ops->acf_status) 1221 err = radio->ops->acf_status(radio->core, &report); 1222 else 1223 err = -ENOENT; 1224 si476x_core_unlock(radio->core); 1225 1226 if (err < 0) 1227 return err; 1228 1229 return simple_read_from_buffer(user_buf, count, ppos, &report, 1230 sizeof(report)); 1231 } 1232 1233 static const struct file_operations radio_acf_fops = { 1234 .open = simple_open, 1235 .llseek = default_llseek, 1236 .read = si476x_radio_read_acf_blob, 1237 }; 1238 1239 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file, 1240 char __user *user_buf, 1241 size_t count, loff_t *ppos) 1242 { 1243 int err; 1244 struct si476x_radio *radio = file->private_data; 1245 struct si476x_rds_blockcount_report report; 1246 1247 si476x_core_lock(radio->core); 1248 if (radio->ops->rds_blckcnt) 1249 err = radio->ops->rds_blckcnt(radio->core, true, 1250 &report); 1251 else 1252 err = -ENOENT; 1253 si476x_core_unlock(radio->core); 1254 1255 if (err < 0) 1256 return err; 1257 1258 return simple_read_from_buffer(user_buf, count, ppos, &report, 1259 sizeof(report)); 1260 } 1261 1262 static const struct file_operations radio_rds_blckcnt_fops = { 1263 .open = simple_open, 1264 .llseek = default_llseek, 1265 .read = si476x_radio_read_rds_blckcnt_blob, 1266 }; 1267 1268 static ssize_t si476x_radio_read_agc_blob(struct file *file, 1269 char __user *user_buf, 1270 size_t count, loff_t *ppos) 1271 { 1272 int err; 1273 struct si476x_radio *radio = file->private_data; 1274 struct si476x_agc_status_report report; 1275 1276 si476x_core_lock(radio->core); 1277 if (radio->ops->rds_blckcnt) 1278 err = radio->ops->agc_status(radio->core, &report); 1279 else 1280 err = -ENOENT; 1281 si476x_core_unlock(radio->core); 1282 1283 if (err < 0) 1284 return err; 1285 1286 return simple_read_from_buffer(user_buf, count, ppos, &report, 1287 sizeof(report)); 1288 } 1289 1290 static const struct file_operations radio_agc_fops = { 1291 .open = simple_open, 1292 .llseek = default_llseek, 1293 .read = si476x_radio_read_agc_blob, 1294 }; 1295 1296 static ssize_t si476x_radio_read_rsq_blob(struct file *file, 1297 char __user *user_buf, 1298 size_t count, loff_t *ppos) 1299 { 1300 int err; 1301 struct si476x_radio *radio = file->private_data; 1302 struct si476x_rsq_status_report report; 1303 struct si476x_rsq_status_args args = { 1304 .primary = false, 1305 .rsqack = false, 1306 .attune = false, 1307 .cancel = false, 1308 .stcack = false, 1309 }; 1310 1311 si476x_core_lock(radio->core); 1312 if (radio->ops->rds_blckcnt) 1313 err = radio->ops->rsq_status(radio->core, &args, &report); 1314 else 1315 err = -ENOENT; 1316 si476x_core_unlock(radio->core); 1317 1318 if (err < 0) 1319 return err; 1320 1321 return simple_read_from_buffer(user_buf, count, ppos, &report, 1322 sizeof(report)); 1323 } 1324 1325 static const struct file_operations radio_rsq_fops = { 1326 .open = simple_open, 1327 .llseek = default_llseek, 1328 .read = si476x_radio_read_rsq_blob, 1329 }; 1330 1331 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file, 1332 char __user *user_buf, 1333 size_t count, loff_t *ppos) 1334 { 1335 int err; 1336 struct si476x_radio *radio = file->private_data; 1337 struct si476x_rsq_status_report report; 1338 struct si476x_rsq_status_args args = { 1339 .primary = true, 1340 .rsqack = false, 1341 .attune = false, 1342 .cancel = false, 1343 .stcack = false, 1344 }; 1345 1346 si476x_core_lock(radio->core); 1347 if (radio->ops->rds_blckcnt) 1348 err = radio->ops->rsq_status(radio->core, &args, &report); 1349 else 1350 err = -ENOENT; 1351 si476x_core_unlock(radio->core); 1352 1353 if (err < 0) 1354 return err; 1355 1356 return simple_read_from_buffer(user_buf, count, ppos, &report, 1357 sizeof(report)); 1358 } 1359 1360 static const struct file_operations radio_rsq_primary_fops = { 1361 .open = simple_open, 1362 .llseek = default_llseek, 1363 .read = si476x_radio_read_rsq_primary_blob, 1364 }; 1365 1366 1367 static int si476x_radio_init_debugfs(struct si476x_radio *radio) 1368 { 1369 struct dentry *dentry; 1370 int ret; 1371 1372 dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); 1373 if (IS_ERR(dentry)) { 1374 ret = PTR_ERR(dentry); 1375 goto exit; 1376 } 1377 radio->debugfs = dentry; 1378 1379 dentry = debugfs_create_file("acf", S_IRUGO, 1380 radio->debugfs, radio, &radio_acf_fops); 1381 if (IS_ERR(dentry)) { 1382 ret = PTR_ERR(dentry); 1383 goto cleanup; 1384 } 1385 1386 dentry = debugfs_create_file("rds_blckcnt", S_IRUGO, 1387 radio->debugfs, radio, 1388 &radio_rds_blckcnt_fops); 1389 if (IS_ERR(dentry)) { 1390 ret = PTR_ERR(dentry); 1391 goto cleanup; 1392 } 1393 1394 dentry = debugfs_create_file("agc", S_IRUGO, 1395 radio->debugfs, radio, &radio_agc_fops); 1396 if (IS_ERR(dentry)) { 1397 ret = PTR_ERR(dentry); 1398 goto cleanup; 1399 } 1400 1401 dentry = debugfs_create_file("rsq", S_IRUGO, 1402 radio->debugfs, radio, &radio_rsq_fops); 1403 if (IS_ERR(dentry)) { 1404 ret = PTR_ERR(dentry); 1405 goto cleanup; 1406 } 1407 1408 dentry = debugfs_create_file("rsq_primary", S_IRUGO, 1409 radio->debugfs, radio, 1410 &radio_rsq_primary_fops); 1411 if (IS_ERR(dentry)) { 1412 ret = PTR_ERR(dentry); 1413 goto cleanup; 1414 } 1415 1416 return 0; 1417 cleanup: 1418 debugfs_remove_recursive(radio->debugfs); 1419 exit: 1420 return ret; 1421 } 1422 1423 1424 static int si476x_radio_add_new_custom(struct si476x_radio *radio, 1425 enum si476x_ctrl_idx idx) 1426 { 1427 int rval; 1428 struct v4l2_ctrl *ctrl; 1429 1430 ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler, 1431 &si476x_ctrls[idx], 1432 NULL); 1433 rval = radio->ctrl_handler.error; 1434 if (ctrl == NULL && rval) 1435 dev_err(radio->v4l2dev.dev, 1436 "Could not initialize '%s' control %d\n", 1437 si476x_ctrls[idx].name, rval); 1438 1439 return rval; 1440 } 1441 1442 static int si476x_radio_probe(struct platform_device *pdev) 1443 { 1444 int rval; 1445 struct si476x_radio *radio; 1446 struct v4l2_ctrl *ctrl; 1447 1448 static atomic_t instance = ATOMIC_INIT(0); 1449 1450 radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL); 1451 if (!radio) 1452 return -ENOMEM; 1453 1454 radio->core = i2c_mfd_cell_to_core(&pdev->dev); 1455 1456 v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance); 1457 1458 rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev); 1459 if (rval) { 1460 dev_err(&pdev->dev, "Cannot register v4l2_device.\n"); 1461 return rval; 1462 } 1463 1464 memcpy(&radio->videodev, &si476x_viddev_template, 1465 sizeof(struct video_device)); 1466 1467 radio->videodev.v4l2_dev = &radio->v4l2dev; 1468 radio->videodev.ioctl_ops = &si4761_ioctl_ops; 1469 1470 video_set_drvdata(&radio->videodev, radio); 1471 platform_set_drvdata(pdev, radio); 1472 1473 1474 radio->v4l2dev.ctrl_handler = &radio->ctrl_handler; 1475 v4l2_ctrl_handler_init(&radio->ctrl_handler, 1476 1 + ARRAY_SIZE(si476x_ctrls)); 1477 1478 if (si476x_core_has_am(radio->core)) { 1479 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, 1480 &si476x_ctrl_ops, 1481 V4L2_CID_POWER_LINE_FREQUENCY, 1482 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 1483 0, 0); 1484 rval = radio->ctrl_handler.error; 1485 if (ctrl == NULL && rval) { 1486 dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n", 1487 rval); 1488 goto exit; 1489 } 1490 1491 rval = si476x_radio_add_new_custom(radio, 1492 SI476X_IDX_HARMONICS_COUNT); 1493 if (rval < 0) 1494 goto exit; 1495 } 1496 1497 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD); 1498 if (rval < 0) 1499 goto exit; 1500 1501 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD); 1502 if (rval < 0) 1503 goto exit; 1504 1505 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR); 1506 if (rval < 0) 1507 goto exit; 1508 1509 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, 1510 &si476x_ctrl_ops, 1511 V4L2_CID_TUNE_DEEMPHASIS, 1512 V4L2_DEEMPHASIS_75_uS, 0, 0); 1513 rval = radio->ctrl_handler.error; 1514 if (ctrl == NULL && rval) { 1515 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n", 1516 rval); 1517 goto exit; 1518 } 1519 1520 ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops, 1521 V4L2_CID_RDS_RECEPTION, 1522 0, 1, 1, 1); 1523 rval = radio->ctrl_handler.error; 1524 if (ctrl == NULL && rval) { 1525 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n", 1526 rval); 1527 goto exit; 1528 } 1529 1530 if (si476x_core_has_diversity(radio->core)) { 1531 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def = 1532 si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode); 1533 si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); 1534 if (rval < 0) 1535 goto exit; 1536 1537 si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK); 1538 if (rval < 0) 1539 goto exit; 1540 } 1541 1542 /* register video device */ 1543 rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1); 1544 if (rval < 0) { 1545 dev_err(&pdev->dev, "Could not register video device\n"); 1546 goto exit; 1547 } 1548 1549 rval = si476x_radio_init_debugfs(radio); 1550 if (rval < 0) { 1551 dev_err(&pdev->dev, "Could not creat debugfs interface\n"); 1552 goto exit; 1553 } 1554 1555 return 0; 1556 exit: 1557 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); 1558 return rval; 1559 } 1560 1561 static int si476x_radio_remove(struct platform_device *pdev) 1562 { 1563 struct si476x_radio *radio = platform_get_drvdata(pdev); 1564 1565 v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); 1566 video_unregister_device(&radio->videodev); 1567 v4l2_device_unregister(&radio->v4l2dev); 1568 debugfs_remove_recursive(radio->debugfs); 1569 1570 return 0; 1571 } 1572 1573 MODULE_ALIAS("platform:si476x-radio"); 1574 1575 static struct platform_driver si476x_radio_driver = { 1576 .driver = { 1577 .name = DRIVER_NAME, 1578 .owner = THIS_MODULE, 1579 }, 1580 .probe = si476x_radio_probe, 1581 .remove = si476x_radio_remove, 1582 }; 1583 module_platform_driver(si476x_radio_driver); 1584 1585 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); 1586 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); 1587 MODULE_LICENSE("GPL"); 1588