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         snprintf(capability->bus_info, sizeof(capability->bus_info),
 333                  "platform:%s", radio->v4l2dev.name);
 334         return 0;
 335 }
 336
 337 static int si476x_radio_enum_freq_bands(struct file *file, void *priv,
 338                                         struct v4l2_frequency_band *band)
 339 {
 340         int err;
 341         struct si476x_radio *radio = video_drvdata(file);
 342
 343         if (band->tuner != 0)
 344                 return -EINVAL;
 345
 346         switch (radio->core->chip_id) {
 347                 /* AM/FM tuners -- all bands are supported */
 348         case SI476X_CHIP_SI4761:
 349         case SI476X_CHIP_SI4764:
 350                 if (band->index < ARRAY_SIZE(si476x_bands)) {
 351                         *band = si476x_bands[band->index];
 352                         err = 0;
 353                 } else {
 354                         err = -EINVAL;
 355                 }
 356                 break;
 357                 /* FM companion tuner chips -- only FM bands are
 358                  * supported */
 359         case SI476X_CHIP_SI4768:
 360                 if (band->index == SI476X_BAND_FM) {
 361                         *band = si476x_bands[band->index];
 362                         err = 0;
 363                 } else {
 364                         err = -EINVAL;
 365                 }
 366                 break;
 367         default:
 368                 err = -EINVAL;
 369         }
 370
 371         return err;
 372 }
 373
 374 static int si476x_radio_g_tuner(struct file *file, void *priv,
 375                                 struct v4l2_tuner *tuner)
 376 {
 377         int err;
 378         struct si476x_rsq_status_report report;
 379         struct si476x_radio *radio = video_drvdata(file);
 380
 381         struct si476x_rsq_status_args args = {
 382                 .primary        = false,
 383                 .rsqack         = false,
 384                 .attune         = false,
 385                 .cancel         = false,
 386                 .stcack         = false,
 387         };
 388
 389         if (tuner->index != 0)
 390                 return -EINVAL;
 391
 392         tuner->type       = V4L2_TUNER_RADIO;
 393         tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies
 394                                                  * in multiples of
 395                                                  * 62.5 Hz */
 396                 | V4L2_TUNER_CAP_STEREO
 397                 | V4L2_TUNER_CAP_HWSEEK_BOUNDED
 398                 | V4L2_TUNER_CAP_HWSEEK_WRAP
 399                 | V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
 400
 401         si476x_core_lock(radio->core);
 402
 403         if (si476x_core_is_a_secondary_tuner(radio->core)) {
 404                 strscpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
 405                 tuner->rxsubchans = 0;
 406                 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
 407         } else if (si476x_core_has_am(radio->core)) {
 408                 if (si476x_core_is_a_primary_tuner(radio->core))
 409                         strscpy(tuner->name, "AM/FM (primary)",
 410                                 sizeof(tuner->name));
 411                 else
 412                         strscpy(tuner->name, "AM/FM", sizeof(tuner->name));
 413
 414                 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO
 415                         | V4L2_TUNER_SUB_RDS;
 416                 tuner->capability |= V4L2_TUNER_CAP_RDS
 417                         | V4L2_TUNER_CAP_RDS_BLOCK_IO
 418                         | V4L2_TUNER_CAP_FREQ_BANDS;
 419
 420                 tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
 421         } else {
 422                 strscpy(tuner->name, "FM", sizeof(tuner->name));
 423                 tuner->rxsubchans = V4L2_TUNER_SUB_RDS;
 424                 tuner->capability |= V4L2_TUNER_CAP_RDS
 425                         | V4L2_TUNER_CAP_RDS_BLOCK_IO
 426                         | V4L2_TUNER_CAP_FREQ_BANDS;
 427                 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
 428         }
 429
 430         tuner->audmode = radio->audmode;
 431
 432         tuner->afc = 1;
 433         tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
 434
 435         err = radio->ops->rsq_status(radio->core,
 436                                      &args, &report);
 437         if (err < 0) {
 438                 tuner->signal = 0;
 439         } else {
 440                 /*
 441                  * tuner->signal value range: 0x0000 .. 0xFFFF,
 442                  * report.rssi: -128 .. 127
 443                  */
 444                 tuner->signal = (report.rssi + 128) * 257;
 445         }
 446         si476x_core_unlock(radio->core);
 447
 448         return err;
 449 }
 450
 451 static int si476x_radio_s_tuner(struct file *file, void *priv,
 452                                 const struct v4l2_tuner *tuner)
 453 {
 454         struct si476x_radio *radio = video_drvdata(file);
 455
 456         if (tuner->index != 0)
 457                 return -EINVAL;
 458
 459         if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
 460             tuner->audmode == V4L2_TUNER_MODE_STEREO)
 461                 radio->audmode = tuner->audmode;
 462         else
 463                 radio->audmode = V4L2_TUNER_MODE_STEREO;
 464
 465         return 0;
 466 }
 467
 468 static int si476x_radio_init_vtable(struct si476x_radio *radio,
 469                                     enum si476x_func func)
 470 {
 471         static const struct si476x_radio_ops fm_ops = {
 472                 .tune_freq              = si476x_core_cmd_fm_tune_freq,
 473                 .seek_start             = si476x_core_cmd_fm_seek_start,
 474                 .rsq_status             = si476x_core_cmd_fm_rsq_status,
 475                 .rds_blckcnt            = si476x_core_cmd_fm_rds_blockcount,
 476                 .phase_diversity        = si476x_core_cmd_fm_phase_diversity,
 477                 .phase_div_status       = si476x_core_cmd_fm_phase_div_status,
 478                 .acf_status             = si476x_core_cmd_fm_acf_status,
 479                 .agc_status             = si476x_core_cmd_agc_status,
 480         };
 481
 482         static const struct si476x_radio_ops am_ops = {
 483                 .tune_freq              = si476x_core_cmd_am_tune_freq,
 484                 .seek_start             = si476x_core_cmd_am_seek_start,
 485                 .rsq_status             = si476x_core_cmd_am_rsq_status,
 486                 .rds_blckcnt            = NULL,
 487                 .phase_diversity        = NULL,
 488                 .phase_div_status       = NULL,
 489                 .acf_status             = si476x_core_cmd_am_acf_status,
 490                 .agc_status             = NULL,
 491         };
 492
 493         switch (func) {
 494         case SI476X_FUNC_FM_RECEIVER:
 495                 radio->ops = &fm_ops;
 496                 return 0;
 497
 498         case SI476X_FUNC_AM_RECEIVER:
 499                 radio->ops = &am_ops;
 500                 return 0;
 501         default:
 502                 WARN(1, "Unexpected tuner function value\n");
 503                 return -EINVAL;
 504         }
 505 }
 506
 507 static int si476x_radio_pretune(struct si476x_radio *radio,
 508                                 enum si476x_func func)
 509 {
 510         int retval;
 511
 512         struct si476x_tune_freq_args args = {
 513                 .zifsr          = false,
 514                 .hd             = false,
 515                 .injside        = SI476X_INJSIDE_AUTO,
 516                 .tunemode       = SI476X_TM_VALIDATED_NORMAL_TUNE,
 517                 .smoothmetrics  = SI476X_SM_INITIALIZE_AUDIO,
 518                 .antcap         = 0,
 519         };
 520
 521         switch (func) {
 522         case SI476X_FUNC_FM_RECEIVER:
 523                 args.freq = v4l2_to_si476x(radio->core,
 524                                            92 * FREQ_MUL);
 525                 retval = radio->ops->tune_freq(radio->core, &args);
 526                 break;
 527         case SI476X_FUNC_AM_RECEIVER:
 528                 args.freq = v4l2_to_si476x(radio->core,
 529                                            0.6 * FREQ_MUL);
 530                 retval = radio->ops->tune_freq(radio->core, &args);
 531                 break;
 532         default:
 533                 WARN(1, "Unexpected tuner function value\n");
 534                 retval = -EINVAL;
 535         }
 536
 537         return retval;
 538 }
 539 static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
 540                                              enum si476x_func func)
 541 {
 542         int err;
 543
 544         /* regcache_mark_dirty(radio->core->regmap); */
 545         err = regcache_sync_region(radio->core->regmap,
 546                                    SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
 547                                    SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
 548         if (err < 0)
 549                 return err;
 550
 551         err = regcache_sync_region(radio->core->regmap,
 552                                    SI476X_PROP_AUDIO_DEEMPHASIS,
 553                                    SI476X_PROP_AUDIO_PWR_LINE_FILTER);
 554         if (err < 0)
 555                 return err;
 556
 557         err = regcache_sync_region(radio->core->regmap,
 558                                    SI476X_PROP_INT_CTL_ENABLE,
 559                                    SI476X_PROP_INT_CTL_ENABLE);
 560         if (err < 0)
 561                 return err;
 562
 563         /*
 564          * Is there any point in restoring SNR and the like
 565          * when switching between AM/FM?
 566          */
 567         err = regcache_sync_region(radio->core->regmap,
 568                                    SI476X_PROP_VALID_MAX_TUNE_ERROR,
 569                                    SI476X_PROP_VALID_MAX_TUNE_ERROR);
 570         if (err < 0)
 571                 return err;
 572
 573         err = regcache_sync_region(radio->core->regmap,
 574                                    SI476X_PROP_VALID_SNR_THRESHOLD,
 575                                    SI476X_PROP_VALID_RSSI_THRESHOLD);
 576         if (err < 0)
 577                 return err;
 578
 579         if (func == SI476X_FUNC_FM_RECEIVER) {
 580                 if (si476x_core_has_diversity(radio->core)) {
 581                         err = si476x_core_cmd_fm_phase_diversity(radio->core,
 582                                                                  radio->core->diversity_mode);
 583                         if (err < 0)
 584                                 return err;
 585                 }
 586
 587                 err = regcache_sync_region(radio->core->regmap,
 588                                            SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
 589                                            SI476X_PROP_FM_RDS_CONFIG);
 590                 if (err < 0)
 591                         return err;
 592         }
 593
 594         return si476x_radio_init_vtable(radio, func);
 595
 596 }
 597
 598 static int si476x_radio_change_func(struct si476x_radio *radio,
 599                                     enum si476x_func func)
 600 {
 601         int err;
 602         bool soft;
 603         /*
 604          * Since power/up down is a very time consuming operation,
 605          * try to avoid doing it if the requested mode matches the one
 606          * the tuner is in
 607          */
 608         if (func == radio->core->power_up_parameters.func)
 609                 return 0;
 610
 611         soft = true;
 612         err = si476x_core_stop(radio->core, soft);
 613         if (err < 0) {
 614                 /*
 615                  * OK, if the chip does not want to play nice let's
 616                  * try to reset it in more brutal way
 617                  */
 618                 soft = false;
 619                 err = si476x_core_stop(radio->core, soft);
 620                 if (err < 0)
 621                         return err;
 622         }
 623         /*
 624           Set the desired radio tuner function
 625          */
 626         radio->core->power_up_parameters.func = func;
 627
 628         err = si476x_core_start(radio->core, soft);
 629         if (err < 0)
 630                 return err;
 631
 632         /*
 633          * No need to do the rest of manipulations for the bootlader
 634          * mode
 635          */
 636         if (func != SI476X_FUNC_FM_RECEIVER &&
 637             func != SI476X_FUNC_AM_RECEIVER)
 638                 return err;
 639
 640         return si476x_radio_do_post_powerup_init(radio, func);
 641 }
 642
 643 static int si476x_radio_g_frequency(struct file *file, void *priv,
 644                               struct v4l2_frequency *f)
 645 {
 646         int err;
 647         struct si476x_radio *radio = video_drvdata(file);
 648
 649         if (f->tuner != 0 ||
 650             f->type  != V4L2_TUNER_RADIO)
 651                 return -EINVAL;
 652
 653         si476x_core_lock(radio->core);
 654
 655         if (radio->ops->rsq_status) {
 656                 struct si476x_rsq_status_report report;
 657                 struct si476x_rsq_status_args   args = {
 658                         .primary        = false,
 659                         .rsqack         = false,
 660                         .attune         = true,
 661                         .cancel         = false,
 662                         .stcack         = false,
 663                 };
 664
 665                 err = radio->ops->rsq_status(radio->core, &args, &report);
 666                 if (!err)
 667                         f->frequency = si476x_to_v4l2(radio->core,
 668                                                       report.readfreq);
 669         } else {
 670                 err = -EINVAL;
 671         }
 672
 673         si476x_core_unlock(radio->core);
 674
 675         return err;
 676 }
 677
 678 static int si476x_radio_s_frequency(struct file *file, void *priv,
 679                                     const struct v4l2_frequency *f)
 680 {
 681         int err;
 682         u32 freq = f->frequency;
 683         struct si476x_tune_freq_args args;
 684         struct si476x_radio *radio = video_drvdata(file);
 685
 686         const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
 687                               si476x_bands[SI476X_BAND_FM].rangelow) / 2;
 688         const int band = (freq > midrange) ?
 689                 SI476X_BAND_FM : SI476X_BAND_AM;
 690         const enum si476x_func func = (band == SI476X_BAND_AM) ?
 691                 SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
 692
 693         if (f->tuner != 0 ||
 694             f->type  != V4L2_TUNER_RADIO)
 695                 return -EINVAL;
 696
 697         si476x_core_lock(radio->core);
 698
 699         freq = clamp(freq,
 700                      si476x_bands[band].rangelow,
 701                      si476x_bands[band].rangehigh);
 702
 703         if (si476x_radio_freq_is_inside_of_the_band(freq,
 704                                                     SI476X_BAND_AM) &&
 705             (!si476x_core_has_am(radio->core) ||
 706              si476x_core_is_a_secondary_tuner(radio->core))) {
 707                 err = -EINVAL;
 708                 goto unlock;
 709         }
 710
 711         err = si476x_radio_change_func(radio, func);
 712         if (err < 0)
 713                 goto unlock;
 714
 715         args.zifsr              = false;
 716         args.hd                 = false;
 717         args.injside            = SI476X_INJSIDE_AUTO;
 718         args.freq               = v4l2_to_si476x(radio->core, freq);
 719         args.tunemode           = SI476X_TM_VALIDATED_NORMAL_TUNE;
 720         args.smoothmetrics      = SI476X_SM_INITIALIZE_AUDIO;
 721         args.antcap             = 0;
 722
 723         err = radio->ops->tune_freq(radio->core, &args);
 724
 725 unlock:
 726         si476x_core_unlock(radio->core);
 727         return err;
 728 }
 729
 730 static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
 731                                        const struct v4l2_hw_freq_seek *seek)
 732 {
 733         int err;
 734         enum si476x_func func;
 735         u32 rangelow = seek->rangelow, rangehigh = seek->rangehigh;
 736         struct si476x_radio *radio = video_drvdata(file);
 737
 738         if (file->f_flags & O_NONBLOCK)
 739                 return -EAGAIN;
 740
 741         if (seek->tuner != 0 ||
 742             seek->type  != V4L2_TUNER_RADIO)
 743                 return -EINVAL;
 744
 745         si476x_core_lock(radio->core);
 746
 747         if (!rangelow) {
 748                 err = regmap_read(radio->core->regmap,
 749                                   SI476X_PROP_SEEK_BAND_BOTTOM,
 750                                   &rangelow);
 751                 if (err)
 752                         goto unlock;
 753                 rangelow = si476x_to_v4l2(radio->core, rangelow);
 754         }
 755         if (!rangehigh) {
 756                 err = regmap_read(radio->core->regmap,
 757                                   SI476X_PROP_SEEK_BAND_TOP,
 758                                   &rangehigh);
 759                 if (err)
 760                         goto unlock;
 761                 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
 762         }
 763
 764         if (rangelow > rangehigh) {
 765                 err = -EINVAL;
 766                 goto unlock;
 767         }
 768
 769         if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
 770                                                      SI476X_BAND_FM)) {
 771                 func = SI476X_FUNC_FM_RECEIVER;
 772
 773         } else if (si476x_core_has_am(radio->core) &&
 774                    si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
 775                                                             SI476X_BAND_AM)) {
 776                 func = SI476X_FUNC_AM_RECEIVER;
 777         } else {
 778                 err = -EINVAL;
 779                 goto unlock;
 780         }
 781
 782         err = si476x_radio_change_func(radio, func);
 783         if (err < 0)
 784                 goto unlock;
 785
 786         if (seek->rangehigh) {
 787                 err = regmap_write(radio->core->regmap,
 788                                    SI476X_PROP_SEEK_BAND_TOP,
 789                                    v4l2_to_si476x(radio->core,
 790                                                   seek->rangehigh));
 791                 if (err)
 792                         goto unlock;
 793         }
 794         if (seek->rangelow) {
 795                 err = regmap_write(radio->core->regmap,
 796                                    SI476X_PROP_SEEK_BAND_BOTTOM,
 797                                    v4l2_to_si476x(radio->core,
 798                                                   seek->rangelow));
 799                 if (err)
 800                         goto unlock;
 801         }
 802         if (seek->spacing) {
 803                 err = regmap_write(radio->core->regmap,
 804                                      SI476X_PROP_SEEK_FREQUENCY_SPACING,
 805                                      v4l2_to_si476x(radio->core,
 806                                                     seek->spacing));
 807                 if (err)
 808                         goto unlock;
 809         }
 810
 811         err = radio->ops->seek_start(radio->core,
 812                                      seek->seek_upward,
 813                                      seek->wrap_around);
 814 unlock:
 815         si476x_core_unlock(radio->core);
 816
 817
 818
 819         return err;
 820 }
 821
 822 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 823 {
 824         int retval;
 825         struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
 826
 827         si476x_core_lock(radio->core);
 828
 829         switch (ctrl->id) {
 830         case V4L2_CID_SI476X_INTERCHIP_LINK:
 831                 if (si476x_core_has_diversity(radio->core)) {
 832                         if (radio->ops->phase_diversity) {
 833                                 retval = radio->ops->phase_div_status(radio->core);
 834                                 if (retval < 0)
 835                                         break;
 836
 837                                 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
 838                                 retval = 0;
 839                                 break;
 840                         } else {
 841                                 retval = -ENOTTY;
 842                                 break;
 843                         }
 844                 }
 845                 retval = -EINVAL;
 846                 break;
 847         default:
 848                 retval = -EINVAL;
 849                 break;
 850         }
 851         si476x_core_unlock(radio->core);
 852         return retval;
 853
 854 }
 855
 856 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
 857 {
 858         int retval;
 859         enum si476x_phase_diversity_mode mode;
 860         struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
 861
 862         si476x_core_lock(radio->core);
 863
 864         switch (ctrl->id) {
 865         case V4L2_CID_SI476X_HARMONICS_COUNT:
 866                 retval = regmap_update_bits(radio->core->regmap,
 867                                             SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 868                                             SI476X_PROP_PWR_HARMONICS_MASK,
 869                                             ctrl->val);
 870                 break;
 871         case V4L2_CID_POWER_LINE_FREQUENCY:
 872                 switch (ctrl->val) {
 873                 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
 874                         retval = regmap_update_bits(radio->core->regmap,
 875                                                     SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 876                                                     SI476X_PROP_PWR_ENABLE_MASK,
 877                                                     0);
 878                         break;
 879                 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
 880                         retval = regmap_update_bits(radio->core->regmap,
 881                                                     SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 882                                                     SI476X_PROP_PWR_GRID_MASK,
 883                                                     SI476X_PROP_PWR_GRID_50HZ);
 884                         break;
 885                 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
 886                         retval = regmap_update_bits(radio->core->regmap,
 887                                                     SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 888                                                     SI476X_PROP_PWR_GRID_MASK,
 889                                                     SI476X_PROP_PWR_GRID_60HZ);
 890                         break;
 891                 default:
 892                         retval = -EINVAL;
 893                         break;
 894                 }
 895                 break;
 896         case V4L2_CID_SI476X_RSSI_THRESHOLD:
 897                 retval = regmap_write(radio->core->regmap,
 898                                       SI476X_PROP_VALID_RSSI_THRESHOLD,
 899                                       ctrl->val);
 900                 break;
 901         case V4L2_CID_SI476X_SNR_THRESHOLD:
 902                 retval = regmap_write(radio->core->regmap,
 903                                       SI476X_PROP_VALID_SNR_THRESHOLD,
 904                                       ctrl->val);
 905                 break;
 906         case V4L2_CID_SI476X_MAX_TUNE_ERROR:
 907                 retval = regmap_write(radio->core->regmap,
 908                                       SI476X_PROP_VALID_MAX_TUNE_ERROR,
 909                                       ctrl->val);
 910                 break;
 911         case V4L2_CID_RDS_RECEPTION:
 912                 /*
 913                  * It looks like RDS related properties are
 914                  * inaccessible when tuner is in AM mode, so cache the
 915                  * changes
 916                  */
 917                 if (si476x_core_is_in_am_receiver_mode(radio->core))
 918                         regcache_cache_only(radio->core->regmap, true);
 919
 920                 if (ctrl->val) {
 921                         retval = regmap_write(radio->core->regmap,
 922                                               SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
 923                                               radio->core->rds_fifo_depth);
 924                         if (retval < 0)
 925                                 break;
 926
 927                         if (radio->core->client->irq) {
 928                                 retval = regmap_write(radio->core->regmap,
 929                                                       SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
 930                                                       SI476X_RDSRECV);
 931                                 if (retval < 0)
 932                                         break;
 933                         }
 934
 935                         /* Drain RDS FIFO before enabling RDS processing */
 936                         retval = si476x_core_cmd_fm_rds_status(radio->core,
 937                                                                false,
 938                                                                true,
 939                                                                true,
 940                                                                NULL);
 941                         if (retval < 0)
 942                                 break;
 943
 944                         retval = regmap_update_bits(radio->core->regmap,
 945                                                     SI476X_PROP_FM_RDS_CONFIG,
 946                                                     SI476X_PROP_RDSEN_MASK,
 947                                                     SI476X_PROP_RDSEN);
 948                 } else {
 949                         retval = regmap_update_bits(radio->core->regmap,
 950                                                     SI476X_PROP_FM_RDS_CONFIG,
 951                                                     SI476X_PROP_RDSEN_MASK,
 952                                                     !SI476X_PROP_RDSEN);
 953                 }
 954
 955                 if (si476x_core_is_in_am_receiver_mode(radio->core))
 956                         regcache_cache_only(radio->core->regmap, false);
 957                 break;
 958         case V4L2_CID_TUNE_DEEMPHASIS:
 959                 retval = regmap_write(radio->core->regmap,
 960                                       SI476X_PROP_AUDIO_DEEMPHASIS,
 961                                       ctrl->val);
 962                 break;
 963
 964         case V4L2_CID_SI476X_DIVERSITY_MODE:
 965                 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
 966
 967                 if (mode == radio->core->diversity_mode) {
 968                         retval = 0;
 969                         break;
 970                 }
 971
 972                 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
 973                         /*
 974                          * Diversity cannot be configured while tuner
 975                          * is in AM mode so save the changes and carry on.
 976                          */
 977                         radio->core->diversity_mode = mode;
 978                         retval = 0;
 979                 } else {
 980                         retval = radio->ops->phase_diversity(radio->core, mode);
 981                         if (!retval)
 982                                 radio->core->diversity_mode = mode;
 983                 }
 984                 break;
 985
 986         default:
 987                 retval = -EINVAL;
 988                 break;
 989         }
 990
 991         si476x_core_unlock(radio->core);
 992
 993         return retval;
 994 }
 995
 996 #ifdef CONFIG_VIDEO_ADV_DEBUG
 997 static int si476x_radio_g_register(struct file *file, void *fh,
 998                                    struct v4l2_dbg_register *reg)
 999 {
1000         int err;
1001         unsigned int value;
1002         struct si476x_radio *radio = video_drvdata(file);
1003
1004         si476x_core_lock(radio->core);
1005         reg->size = 2;
1006         err = regmap_read(radio->core->regmap,
1007                           (unsigned int)reg->reg, &value);
1008         reg->val = value;
1009         si476x_core_unlock(radio->core);
1010
1011         return err;
1012 }
1013 static int si476x_radio_s_register(struct file *file, void *fh,
1014                                    const struct v4l2_dbg_register *reg)
1015 {
1016
1017         int err;
1018         struct si476x_radio *radio = video_drvdata(file);
1019
1020         si476x_core_lock(radio->core);
1021         err = regmap_write(radio->core->regmap,
1022                            (unsigned int)reg->reg,
1023                            (unsigned int)reg->val);
1024         si476x_core_unlock(radio->core);
1025
1026         return err;
1027 }
1028 #endif
1029
1030 static int si476x_radio_fops_open(struct file *file)
1031 {
1032         struct si476x_radio *radio = video_drvdata(file);
1033         int err;
1034
1035         err = v4l2_fh_open(file);
1036         if (err)
1037                 return err;
1038
1039         if (v4l2_fh_is_singular_file(file)) {
1040                 si476x_core_lock(radio->core);
1041                 err = si476x_core_set_power_state(radio->core,
1042                                                   SI476X_POWER_UP_FULL);
1043                 if (err < 0)
1044                         goto done;
1045
1046                 err = si476x_radio_do_post_powerup_init(radio,
1047                                                         radio->core->power_up_parameters.func);
1048                 if (err < 0)
1049                         goto power_down;
1050
1051                 err = si476x_radio_pretune(radio,
1052                                            radio->core->power_up_parameters.func);
1053                 if (err < 0)
1054                         goto power_down;
1055
1056                 si476x_core_unlock(radio->core);
1057                 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1058                 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1059         }
1060
1061         return err;
1062
1063 power_down:
1064         si476x_core_set_power_state(radio->core,
1065                                     SI476X_POWER_DOWN);
1066 done:
1067         si476x_core_unlock(radio->core);
1068         v4l2_fh_release(file);
1069
1070         return err;
1071 }
1072
1073 static int si476x_radio_fops_release(struct file *file)
1074 {
1075         struct si476x_radio *radio = video_drvdata(file);
1076
1077         if (v4l2_fh_is_singular_file(file) &&
1078             atomic_read(&radio->core->is_alive))
1079                 si476x_core_set_power_state(radio->core,
1080                                             SI476X_POWER_DOWN);
1081
1082         return v4l2_fh_release(file);
1083 }
1084
1085 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1086                                       size_t count, loff_t *ppos)
1087 {
1088         ssize_t      rval;
1089         size_t       fifo_len;
1090         unsigned int copied;
1091
1092         struct si476x_radio *radio = video_drvdata(file);
1093
1094         /* block if no new data available */
1095         if (kfifo_is_empty(&radio->core->rds_fifo)) {
1096                 if (file->f_flags & O_NONBLOCK)
1097                         return -EWOULDBLOCK;
1098
1099                 rval = wait_event_interruptible(radio->core->rds_read_queue,
1100                                                 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1101                                                  !atomic_read(&radio->core->is_alive)));
1102                 if (rval < 0)
1103                         return -EINTR;
1104
1105                 if (!atomic_read(&radio->core->is_alive))
1106                         return -ENODEV;
1107         }
1108
1109         fifo_len = kfifo_len(&radio->core->rds_fifo);
1110
1111         if (kfifo_to_user(&radio->core->rds_fifo, buf,
1112                           min(fifo_len, count),
1113                           &copied) != 0) {
1114                 dev_warn(&radio->videodev.dev,
1115                          "Error during FIFO to userspace copy\n");
1116                 rval = -EIO;
1117         } else {
1118                 rval = (ssize_t)copied;
1119         }
1120
1121         return rval;
1122 }
1123
1124 static __poll_t si476x_radio_fops_poll(struct file *file,
1125                                 struct poll_table_struct *pts)
1126 {
1127         struct si476x_radio *radio = video_drvdata(file);
1128         __poll_t req_events = poll_requested_events(pts);
1129         __poll_t err = v4l2_ctrl_poll(file, pts);
1130
1131         if (req_events & (EPOLLIN | EPOLLRDNORM)) {
1132                 if (atomic_read(&radio->core->is_alive))
1133                         poll_wait(file, &radio->core->rds_read_queue, pts);
1134
1135                 if (!atomic_read(&radio->core->is_alive))
1136                         err = EPOLLHUP;
1137
1138                 if (!kfifo_is_empty(&radio->core->rds_fifo))
1139                         err = EPOLLIN | EPOLLRDNORM;
1140         }
1141
1142         return err;
1143 }
1144
1145 static const struct v4l2_file_operations si476x_fops = {
1146         .owner                  = THIS_MODULE,
1147         .read                   = si476x_radio_fops_read,
1148         .poll                   = si476x_radio_fops_poll,
1149         .unlocked_ioctl         = video_ioctl2,
1150         .open                   = si476x_radio_fops_open,
1151         .release                = si476x_radio_fops_release,
1152 };
1153
1154
1155 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1156         .vidioc_querycap                = si476x_radio_querycap,
1157         .vidioc_g_tuner                 = si476x_radio_g_tuner,
1158         .vidioc_s_tuner                 = si476x_radio_s_tuner,
1159
1160         .vidioc_g_frequency             = si476x_radio_g_frequency,
1161         .vidioc_s_frequency             = si476x_radio_s_frequency,
1162         .vidioc_s_hw_freq_seek          = si476x_radio_s_hw_freq_seek,
1163         .vidioc_enum_freq_bands         = si476x_radio_enum_freq_bands,
1164
1165         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
1166         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
1167
1168 #ifdef CONFIG_VIDEO_ADV_DEBUG
1169         .vidioc_g_register              = si476x_radio_g_register,
1170         .vidioc_s_register              = si476x_radio_s_register,
1171 #endif
1172 };
1173
1174
1175 static const struct video_device si476x_viddev_template = {
1176         .fops                   = &si476x_fops,
1177         .name                   = DRIVER_NAME,
1178         .release                = video_device_release_empty,
1179 };
1180
1181
1182
1183 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1184                                           char __user *user_buf,
1185                                           size_t count, loff_t *ppos)
1186 {
1187         int err;
1188         struct si476x_radio *radio = file->private_data;
1189         struct si476x_acf_status_report report;
1190
1191         si476x_core_lock(radio->core);
1192         if (radio->ops->acf_status)
1193                 err = radio->ops->acf_status(radio->core, &report);
1194         else
1195                 err = -ENOENT;
1196         si476x_core_unlock(radio->core);
1197
1198         if (err < 0)
1199                 return err;
1200
1201         return simple_read_from_buffer(user_buf, count, ppos, &report,
1202                                        sizeof(report));
1203 }
1204
1205 static const struct file_operations radio_acf_fops = {
1206         .open   = simple_open,
1207         .llseek = default_llseek,
1208         .read   = si476x_radio_read_acf_blob,
1209 };
1210
1211 static ssize_t si476x_radio_read_rds_blckcnt_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_rds_blockcount_report report;
1218
1219         si476x_core_lock(radio->core);
1220         if (radio->ops->rds_blckcnt)
1221                 err = radio->ops->rds_blckcnt(radio->core, true,
1222                                                &report);
1223         else
1224                 err = -ENOENT;
1225         si476x_core_unlock(radio->core);
1226
1227         if (err < 0)
1228                 return err;
1229
1230         return simple_read_from_buffer(user_buf, count, ppos, &report,
1231                                        sizeof(report));
1232 }
1233
1234 static const struct file_operations radio_rds_blckcnt_fops = {
1235         .open   = simple_open,
1236         .llseek = default_llseek,
1237         .read   = si476x_radio_read_rds_blckcnt_blob,
1238 };
1239
1240 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1241                                           char __user *user_buf,
1242                                           size_t count, loff_t *ppos)
1243 {
1244         int err;
1245         struct si476x_radio *radio = file->private_data;
1246         struct si476x_agc_status_report report;
1247
1248         si476x_core_lock(radio->core);
1249         if (radio->ops->rds_blckcnt)
1250                 err = radio->ops->agc_status(radio->core, &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_agc_fops = {
1263         .open   = simple_open,
1264         .llseek = default_llseek,
1265         .read   = si476x_radio_read_agc_blob,
1266 };
1267
1268 static ssize_t si476x_radio_read_rsq_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_rsq_status_report report;
1275         struct si476x_rsq_status_args args = {
1276                 .primary        = false,
1277                 .rsqack         = false,
1278                 .attune         = false,
1279                 .cancel         = false,
1280                 .stcack         = false,
1281         };
1282
1283         si476x_core_lock(radio->core);
1284         if (radio->ops->rds_blckcnt)
1285                 err = radio->ops->rsq_status(radio->core, &args, &report);
1286         else
1287                 err = -ENOENT;
1288         si476x_core_unlock(radio->core);
1289
1290         if (err < 0)
1291                 return err;
1292
1293         return simple_read_from_buffer(user_buf, count, ppos, &report,
1294                                        sizeof(report));
1295 }
1296
1297 static const struct file_operations radio_rsq_fops = {
1298         .open   = simple_open,
1299         .llseek = default_llseek,
1300         .read   = si476x_radio_read_rsq_blob,
1301 };
1302
1303 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1304                                                   char __user *user_buf,
1305                                                   size_t count, loff_t *ppos)
1306 {
1307         int err;
1308         struct si476x_radio *radio = file->private_data;
1309         struct si476x_rsq_status_report report;
1310         struct si476x_rsq_status_args args = {
1311                 .primary        = true,
1312                 .rsqack         = false,
1313                 .attune         = false,
1314                 .cancel         = false,
1315                 .stcack         = false,
1316         };
1317
1318         si476x_core_lock(radio->core);
1319         if (radio->ops->rds_blckcnt)
1320                 err = radio->ops->rsq_status(radio->core, &args, &report);
1321         else
1322                 err = -ENOENT;
1323         si476x_core_unlock(radio->core);
1324
1325         if (err < 0)
1326                 return err;
1327
1328         return simple_read_from_buffer(user_buf, count, ppos, &report,
1329                                        sizeof(report));
1330 }
1331
1332 static const struct file_operations radio_rsq_primary_fops = {
1333         .open   = simple_open,
1334         .llseek = default_llseek,
1335         .read   = si476x_radio_read_rsq_primary_blob,
1336 };
1337
1338
1339 static void si476x_radio_init_debugfs(struct si476x_radio *radio)
1340 {
1341         radio->debugfs = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1342
1343         debugfs_create_file("acf", S_IRUGO, radio->debugfs, radio,
1344                             &radio_acf_fops);
1345
1346         debugfs_create_file("rds_blckcnt", S_IRUGO, radio->debugfs, radio,
1347                             &radio_rds_blckcnt_fops);
1348
1349         debugfs_create_file("agc", S_IRUGO, radio->debugfs, radio,
1350                             &radio_agc_fops);
1351
1352         debugfs_create_file("rsq", S_IRUGO, radio->debugfs, radio,
1353                             &radio_rsq_fops);
1354
1355         debugfs_create_file("rsq_primary", S_IRUGO, radio->debugfs, radio,
1356                             &radio_rsq_primary_fops);
1357 }
1358
1359
1360 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1361                                        enum si476x_ctrl_idx idx)
1362 {
1363         int rval;
1364         struct v4l2_ctrl *ctrl;
1365
1366         ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1367                                     &si476x_ctrls[idx],
1368                                     NULL);
1369         rval = radio->ctrl_handler.error;
1370         if (ctrl == NULL && rval)
1371                 dev_err(radio->v4l2dev.dev,
1372                         "Could not initialize '%s' control %d\n",
1373                         si476x_ctrls[idx].name, rval);
1374
1375         return rval;
1376 }
1377
1378 static int si476x_radio_probe(struct platform_device *pdev)
1379 {
1380         int rval;
1381         struct si476x_radio *radio;
1382         struct v4l2_ctrl *ctrl;
1383
1384         static atomic_t instance = ATOMIC_INIT(0);
1385
1386         radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1387         if (!radio)
1388                 return -ENOMEM;
1389
1390         radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1391
1392         v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1393
1394         rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1395         if (rval) {
1396                 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1397                 return rval;
1398         }
1399
1400         memcpy(&radio->videodev, &si476x_viddev_template,
1401                sizeof(struct video_device));
1402
1403         radio->videodev.v4l2_dev  = &radio->v4l2dev;
1404         radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1405         radio->videodev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
1406                                       V4L2_CAP_HW_FREQ_SEEK;
1407
1408         si476x_core_lock(radio->core);
1409         if (!si476x_core_is_a_secondary_tuner(radio->core))
1410                 radio->videodev.device_caps |= V4L2_CAP_RDS_CAPTURE |
1411                                                V4L2_CAP_READWRITE;
1412         si476x_core_unlock(radio->core);
1413
1414         video_set_drvdata(&radio->videodev, radio);
1415         platform_set_drvdata(pdev, radio);
1416
1417
1418         radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1419         v4l2_ctrl_handler_init(&radio->ctrl_handler,
1420                                1 + ARRAY_SIZE(si476x_ctrls));
1421
1422         if (si476x_core_has_am(radio->core)) {
1423                 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1424                                               &si476x_ctrl_ops,
1425                                               V4L2_CID_POWER_LINE_FREQUENCY,
1426                                               V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1427                                               0, 0);
1428                 rval = radio->ctrl_handler.error;
1429                 if (ctrl == NULL && rval) {
1430                         dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1431                                 rval);
1432                         goto exit;
1433                 }
1434
1435                 rval = si476x_radio_add_new_custom(radio,
1436                                                    SI476X_IDX_HARMONICS_COUNT);
1437                 if (rval < 0)
1438                         goto exit;
1439         }
1440
1441         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1442         if (rval < 0)
1443                 goto exit;
1444
1445         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1446         if (rval < 0)
1447                 goto exit;
1448
1449         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1450         if (rval < 0)
1451                 goto exit;
1452
1453         ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1454                                       &si476x_ctrl_ops,
1455                                       V4L2_CID_TUNE_DEEMPHASIS,
1456                                       V4L2_DEEMPHASIS_75_uS, 0, 0);
1457         rval = radio->ctrl_handler.error;
1458         if (ctrl == NULL && rval) {
1459                 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1460                         rval);
1461                 goto exit;
1462         }
1463
1464         ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1465                                  V4L2_CID_RDS_RECEPTION,
1466                                  0, 1, 1, 1);
1467         rval = radio->ctrl_handler.error;
1468         if (ctrl == NULL && rval) {
1469                 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1470                         rval);
1471                 goto exit;
1472         }
1473
1474         if (si476x_core_has_diversity(radio->core)) {
1475                 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1476                         si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1477                 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1478                 if (rval < 0)
1479                         goto exit;
1480
1481                 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1482                 if (rval < 0)
1483                         goto exit;
1484         }
1485
1486         /* register video device */
1487         rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1488         if (rval < 0) {
1489                 dev_err(&pdev->dev, "Could not register video device\n");
1490                 goto exit;
1491         }
1492
1493         si476x_radio_init_debugfs(radio);
1494
1495         return 0;
1496 exit:
1497         v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1498         return rval;
1499 }
1500
1501 static void si476x_radio_remove(struct platform_device *pdev)
1502 {
1503         struct si476x_radio *radio = platform_get_drvdata(pdev);
1504
1505         v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1506         video_unregister_device(&radio->videodev);
1507         v4l2_device_unregister(&radio->v4l2dev);
1508         debugfs_remove_recursive(radio->debugfs);
1509 }
1510
1511 MODULE_ALIAS("platform:si476x-radio");
1512
1513 static struct platform_driver si476x_radio_driver = {
1514         .driver         = {
1515                 .name   = DRIVER_NAME,
1516         },
1517         .probe          = si476x_radio_probe,
1518         .remove_new     = si476x_radio_remove,
1519 };
1520 module_platform_driver(si476x_radio_driver);
1521
1522 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1523 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1524 MODULE_LICENSE("GPL");