drivers/media/radio/radio-si476x.c

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