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 detrmine 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 in. 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_dev_to_radio(struct v4l2_device *d)
 317 {
 318         return container_of(d, struct si476x_radio, v4l2dev);
 319 }
 320
 321 static inline struct si476x_radio *
 322 v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d)
 323 {
 324         return container_of(d, struct si476x_radio, ctrl_handler);
 325 }
 326
 327 /*
 328  * si476x_vidioc_querycap - query device capabilities
 329  */
 330 static int si476x_radio_querycap(struct file *file, void *priv,
 331                                  struct v4l2_capability *capability)
 332 {
 333         struct si476x_radio *radio = video_drvdata(file);
 334
 335         strscpy(capability->driver, radio->v4l2dev.name,
 336                 sizeof(capability->driver));
 337         strscpy(capability->card,   DRIVER_CARD, sizeof(capability->card));
 338         snprintf(capability->bus_info, sizeof(capability->bus_info),
 339                  "platform:%s", radio->v4l2dev.name);
 340         return 0;
 341 }
 342
 343 static int si476x_radio_enum_freq_bands(struct file *file, void *priv,
 344                                         struct v4l2_frequency_band *band)
 345 {
 346         int err;
 347         struct si476x_radio *radio = video_drvdata(file);
 348
 349         if (band->tuner != 0)
 350                 return -EINVAL;
 351
 352         switch (radio->core->chip_id) {
 353                 /* AM/FM tuners -- all bands are supported */
 354         case SI476X_CHIP_SI4761:
 355         case SI476X_CHIP_SI4764:
 356                 if (band->index < ARRAY_SIZE(si476x_bands)) {
 357                         *band = si476x_bands[band->index];
 358                         err = 0;
 359                 } else {
 360                         err = -EINVAL;
 361                 }
 362                 break;
 363                 /* FM companion tuner chips -- only FM bands are
 364                  * supported */
 365         case SI476X_CHIP_SI4768:
 366                 if (band->index == SI476X_BAND_FM) {
 367                         *band = si476x_bands[band->index];
 368                         err = 0;
 369                 } else {
 370                         err = -EINVAL;
 371                 }
 372                 break;
 373         default:
 374                 err = -EINVAL;
 375         }
 376
 377         return err;
 378 }
 379
 380 static int si476x_radio_g_tuner(struct file *file, void *priv,
 381                                 struct v4l2_tuner *tuner)
 382 {
 383         int err;
 384         struct si476x_rsq_status_report report;
 385         struct si476x_radio *radio = video_drvdata(file);
 386
 387         struct si476x_rsq_status_args args = {
 388                 .primary        = false,
 389                 .rsqack         = false,
 390                 .attune         = false,
 391                 .cancel         = false,
 392                 .stcack         = false,
 393         };
 394
 395         if (tuner->index != 0)
 396                 return -EINVAL;
 397
 398         tuner->type       = V4L2_TUNER_RADIO;
 399         tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies
 400                                                  * in multiples of
 401                                                  * 62.5 Hz */
 402                 | V4L2_TUNER_CAP_STEREO
 403                 | V4L2_TUNER_CAP_HWSEEK_BOUNDED
 404                 | V4L2_TUNER_CAP_HWSEEK_WRAP
 405                 | V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
 406
 407         si476x_core_lock(radio->core);
 408
 409         if (si476x_core_is_a_secondary_tuner(radio->core)) {
 410                 strscpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
 411                 tuner->rxsubchans = 0;
 412                 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
 413         } else if (si476x_core_has_am(radio->core)) {
 414                 if (si476x_core_is_a_primary_tuner(radio->core))
 415                         strscpy(tuner->name, "AM/FM (primary)",
 416                                 sizeof(tuner->name));
 417                 else
 418                         strscpy(tuner->name, "AM/FM", sizeof(tuner->name));
 419
 420                 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO
 421                         | 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
 426                 tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
 427         } else {
 428                 strscpy(tuner->name, "FM", sizeof(tuner->name));
 429                 tuner->rxsubchans = V4L2_TUNER_SUB_RDS;
 430                 tuner->capability |= V4L2_TUNER_CAP_RDS
 431                         | V4L2_TUNER_CAP_RDS_BLOCK_IO
 432                         | V4L2_TUNER_CAP_FREQ_BANDS;
 433                 tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
 434         }
 435
 436         tuner->audmode = radio->audmode;
 437
 438         tuner->afc = 1;
 439         tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
 440
 441         err = radio->ops->rsq_status(radio->core,
 442                                      &args, &report);
 443         if (err < 0) {
 444                 tuner->signal = 0;
 445         } else {
 446                 /*
 447                  * tuner->signal value range: 0x0000 .. 0xFFFF,
 448                  * report.rssi: -128 .. 127
 449                  */
 450                 tuner->signal = (report.rssi + 128) * 257;
 451         }
 452         si476x_core_unlock(radio->core);
 453
 454         return err;
 455 }
 456
 457 static int si476x_radio_s_tuner(struct file *file, void *priv,
 458                                 const struct v4l2_tuner *tuner)
 459 {
 460         struct si476x_radio *radio = video_drvdata(file);
 461
 462         if (tuner->index != 0)
 463                 return -EINVAL;
 464
 465         if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
 466             tuner->audmode == V4L2_TUNER_MODE_STEREO)
 467                 radio->audmode = tuner->audmode;
 468         else
 469                 radio->audmode = V4L2_TUNER_MODE_STEREO;
 470
 471         return 0;
 472 }
 473
 474 static int si476x_radio_init_vtable(struct si476x_radio *radio,
 475                                     enum si476x_func func)
 476 {
 477         static const struct si476x_radio_ops fm_ops = {
 478                 .tune_freq              = si476x_core_cmd_fm_tune_freq,
 479                 .seek_start             = si476x_core_cmd_fm_seek_start,
 480                 .rsq_status             = si476x_core_cmd_fm_rsq_status,
 481                 .rds_blckcnt            = si476x_core_cmd_fm_rds_blockcount,
 482                 .phase_diversity        = si476x_core_cmd_fm_phase_diversity,
 483                 .phase_div_status       = si476x_core_cmd_fm_phase_div_status,
 484                 .acf_status             = si476x_core_cmd_fm_acf_status,
 485                 .agc_status             = si476x_core_cmd_agc_status,
 486         };
 487
 488         static const struct si476x_radio_ops am_ops = {
 489                 .tune_freq              = si476x_core_cmd_am_tune_freq,
 490                 .seek_start             = si476x_core_cmd_am_seek_start,
 491                 .rsq_status             = si476x_core_cmd_am_rsq_status,
 492                 .rds_blckcnt            = NULL,
 493                 .phase_diversity        = NULL,
 494                 .phase_div_status       = NULL,
 495                 .acf_status             = si476x_core_cmd_am_acf_status,
 496                 .agc_status             = NULL,
 497         };
 498
 499         switch (func) {
 500         case SI476X_FUNC_FM_RECEIVER:
 501                 radio->ops = &fm_ops;
 502                 return 0;
 503
 504         case SI476X_FUNC_AM_RECEIVER:
 505                 radio->ops = &am_ops;
 506                 return 0;
 507         default:
 508                 WARN(1, "Unexpected tuner function value\n");
 509                 return -EINVAL;
 510         }
 511 }
 512
 513 static int si476x_radio_pretune(struct si476x_radio *radio,
 514                                 enum si476x_func func)
 515 {
 516         int retval;
 517
 518         struct si476x_tune_freq_args args = {
 519                 .zifsr          = false,
 520                 .hd             = false,
 521                 .injside        = SI476X_INJSIDE_AUTO,
 522                 .tunemode       = SI476X_TM_VALIDATED_NORMAL_TUNE,
 523                 .smoothmetrics  = SI476X_SM_INITIALIZE_AUDIO,
 524                 .antcap         = 0,
 525         };
 526
 527         switch (func) {
 528         case SI476X_FUNC_FM_RECEIVER:
 529                 args.freq = v4l2_to_si476x(radio->core,
 530                                            92 * FREQ_MUL);
 531                 retval = radio->ops->tune_freq(radio->core, &args);
 532                 break;
 533         case SI476X_FUNC_AM_RECEIVER:
 534                 args.freq = v4l2_to_si476x(radio->core,
 535                                            0.6 * FREQ_MUL);
 536                 retval = radio->ops->tune_freq(radio->core, &args);
 537                 break;
 538         default:
 539                 WARN(1, "Unexpected tuner function value\n");
 540                 retval = -EINVAL;
 541         }
 542
 543         return retval;
 544 }
 545 static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
 546                                              enum si476x_func func)
 547 {
 548         int err;
 549
 550         /* regcache_mark_dirty(radio->core->regmap); */
 551         err = regcache_sync_region(radio->core->regmap,
 552                                    SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
 553                                    SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
 554         if (err < 0)
 555                 return err;
 556
 557         err = regcache_sync_region(radio->core->regmap,
 558                                    SI476X_PROP_AUDIO_DEEMPHASIS,
 559                                    SI476X_PROP_AUDIO_PWR_LINE_FILTER);
 560         if (err < 0)
 561                 return err;
 562
 563         err = regcache_sync_region(radio->core->regmap,
 564                                    SI476X_PROP_INT_CTL_ENABLE,
 565                                    SI476X_PROP_INT_CTL_ENABLE);
 566         if (err < 0)
 567                 return err;
 568
 569         /*
 570          * Is there any point in restoring SNR and the like
 571          * when switching between AM/FM?
 572          */
 573         err = regcache_sync_region(radio->core->regmap,
 574                                    SI476X_PROP_VALID_MAX_TUNE_ERROR,
 575                                    SI476X_PROP_VALID_MAX_TUNE_ERROR);
 576         if (err < 0)
 577                 return err;
 578
 579         err = regcache_sync_region(radio->core->regmap,
 580                                    SI476X_PROP_VALID_SNR_THRESHOLD,
 581                                    SI476X_PROP_VALID_RSSI_THRESHOLD);
 582         if (err < 0)
 583                 return err;
 584
 585         if (func == SI476X_FUNC_FM_RECEIVER) {
 586                 if (si476x_core_has_diversity(radio->core)) {
 587                         err = si476x_core_cmd_fm_phase_diversity(radio->core,
 588                                                                  radio->core->diversity_mode);
 589                         if (err < 0)
 590                                 return err;
 591                 }
 592
 593                 err = regcache_sync_region(radio->core->regmap,
 594                                            SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
 595                                            SI476X_PROP_FM_RDS_CONFIG);
 596                 if (err < 0)
 597                         return err;
 598         }
 599
 600         return si476x_radio_init_vtable(radio, func);
 601
 602 }
 603
 604 static int si476x_radio_change_func(struct si476x_radio *radio,
 605                                     enum si476x_func func)
 606 {
 607         int err;
 608         bool soft;
 609         /*
 610          * Since power/up down is a very time consuming operation,
 611          * try to avoid doing it if the requested mode matches the one
 612          * the tuner is in
 613          */
 614         if (func == radio->core->power_up_parameters.func)
 615                 return 0;
 616
 617         soft = true;
 618         err = si476x_core_stop(radio->core, soft);
 619         if (err < 0) {
 620                 /*
 621                  * OK, if the chip does not want to play nice let's
 622                  * try to reset it in more brutal way
 623                  */
 624                 soft = false;
 625                 err = si476x_core_stop(radio->core, soft);
 626                 if (err < 0)
 627                         return err;
 628         }
 629         /*
 630           Set the desired radio tuner function
 631          */
 632         radio->core->power_up_parameters.func = func;
 633
 634         err = si476x_core_start(radio->core, soft);
 635         if (err < 0)
 636                 return err;
 637
 638         /*
 639          * No need to do the rest of manipulations for the bootlader
 640          * mode
 641          */
 642         if (func != SI476X_FUNC_FM_RECEIVER &&
 643             func != SI476X_FUNC_AM_RECEIVER)
 644                 return err;
 645
 646         return si476x_radio_do_post_powerup_init(radio, func);
 647 }
 648
 649 static int si476x_radio_g_frequency(struct file *file, void *priv,
 650                               struct v4l2_frequency *f)
 651 {
 652         int err;
 653         struct si476x_radio *radio = video_drvdata(file);
 654
 655         if (f->tuner != 0 ||
 656             f->type  != V4L2_TUNER_RADIO)
 657                 return -EINVAL;
 658
 659         si476x_core_lock(radio->core);
 660
 661         if (radio->ops->rsq_status) {
 662                 struct si476x_rsq_status_report report;
 663                 struct si476x_rsq_status_args   args = {
 664                         .primary        = false,
 665                         .rsqack         = false,
 666                         .attune         = true,
 667                         .cancel         = false,
 668                         .stcack         = false,
 669                 };
 670
 671                 err = radio->ops->rsq_status(radio->core, &args, &report);
 672                 if (!err)
 673                         f->frequency = si476x_to_v4l2(radio->core,
 674                                                       report.readfreq);
 675         } else {
 676                 err = -EINVAL;
 677         }
 678
 679         si476x_core_unlock(radio->core);
 680
 681         return err;
 682 }
 683
 684 static int si476x_radio_s_frequency(struct file *file, void *priv,
 685                                     const struct v4l2_frequency *f)
 686 {
 687         int err;
 688         u32 freq = f->frequency;
 689         struct si476x_tune_freq_args args;
 690         struct si476x_radio *radio = video_drvdata(file);
 691
 692         const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
 693                               si476x_bands[SI476X_BAND_FM].rangelow) / 2;
 694         const int band = (freq > midrange) ?
 695                 SI476X_BAND_FM : SI476X_BAND_AM;
 696         const enum si476x_func func = (band == SI476X_BAND_AM) ?
 697                 SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
 698
 699         if (f->tuner != 0 ||
 700             f->type  != V4L2_TUNER_RADIO)
 701                 return -EINVAL;
 702
 703         si476x_core_lock(radio->core);
 704
 705         freq = clamp(freq,
 706                      si476x_bands[band].rangelow,
 707                      si476x_bands[band].rangehigh);
 708
 709         if (si476x_radio_freq_is_inside_of_the_band(freq,
 710                                                     SI476X_BAND_AM) &&
 711             (!si476x_core_has_am(radio->core) ||
 712              si476x_core_is_a_secondary_tuner(radio->core))) {
 713                 err = -EINVAL;
 714                 goto unlock;
 715         }
 716
 717         err = si476x_radio_change_func(radio, func);
 718         if (err < 0)
 719                 goto unlock;
 720
 721         args.zifsr              = false;
 722         args.hd                 = false;
 723         args.injside            = SI476X_INJSIDE_AUTO;
 724         args.freq               = v4l2_to_si476x(radio->core, freq);
 725         args.tunemode           = SI476X_TM_VALIDATED_NORMAL_TUNE;
 726         args.smoothmetrics      = SI476X_SM_INITIALIZE_AUDIO;
 727         args.antcap             = 0;
 728
 729         err = radio->ops->tune_freq(radio->core, &args);
 730
 731 unlock:
 732         si476x_core_unlock(radio->core);
 733         return err;
 734 }
 735
 736 static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
 737                                        const struct v4l2_hw_freq_seek *seek)
 738 {
 739         int err;
 740         enum si476x_func func;
 741         u32 rangelow = seek->rangelow, rangehigh = seek->rangehigh;
 742         struct si476x_radio *radio = video_drvdata(file);
 743
 744         if (file->f_flags & O_NONBLOCK)
 745                 return -EAGAIN;
 746
 747         if (seek->tuner != 0 ||
 748             seek->type  != V4L2_TUNER_RADIO)
 749                 return -EINVAL;
 750
 751         si476x_core_lock(radio->core);
 752
 753         if (!rangelow) {
 754                 err = regmap_read(radio->core->regmap,
 755                                   SI476X_PROP_SEEK_BAND_BOTTOM,
 756                                   &rangelow);
 757                 if (err)
 758                         goto unlock;
 759                 rangelow = si476x_to_v4l2(radio->core, rangelow);
 760         }
 761         if (!rangehigh) {
 762                 err = regmap_read(radio->core->regmap,
 763                                   SI476X_PROP_SEEK_BAND_TOP,
 764                                   &rangehigh);
 765                 if (err)
 766                         goto unlock;
 767                 rangehigh = si476x_to_v4l2(radio->core, rangehigh);
 768         }
 769
 770         if (rangelow > rangehigh) {
 771                 err = -EINVAL;
 772                 goto unlock;
 773         }
 774
 775         if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
 776                                                      SI476X_BAND_FM)) {
 777                 func = SI476X_FUNC_FM_RECEIVER;
 778
 779         } else if (si476x_core_has_am(radio->core) &&
 780                    si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh,
 781                                                             SI476X_BAND_AM)) {
 782                 func = SI476X_FUNC_AM_RECEIVER;
 783         } else {
 784                 err = -EINVAL;
 785                 goto unlock;
 786         }
 787
 788         err = si476x_radio_change_func(radio, func);
 789         if (err < 0)
 790                 goto unlock;
 791
 792         if (seek->rangehigh) {
 793                 err = regmap_write(radio->core->regmap,
 794                                    SI476X_PROP_SEEK_BAND_TOP,
 795                                    v4l2_to_si476x(radio->core,
 796                                                   seek->rangehigh));
 797                 if (err)
 798                         goto unlock;
 799         }
 800         if (seek->rangelow) {
 801                 err = regmap_write(radio->core->regmap,
 802                                    SI476X_PROP_SEEK_BAND_BOTTOM,
 803                                    v4l2_to_si476x(radio->core,
 804                                                   seek->rangelow));
 805                 if (err)
 806                         goto unlock;
 807         }
 808         if (seek->spacing) {
 809                 err = regmap_write(radio->core->regmap,
 810                                      SI476X_PROP_SEEK_FREQUENCY_SPACING,
 811                                      v4l2_to_si476x(radio->core,
 812                                                     seek->spacing));
 813                 if (err)
 814                         goto unlock;
 815         }
 816
 817         err = radio->ops->seek_start(radio->core,
 818                                      seek->seek_upward,
 819                                      seek->wrap_around);
 820 unlock:
 821         si476x_core_unlock(radio->core);
 822
 823
 824
 825         return err;
 826 }
 827
 828 static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 829 {
 830         int retval;
 831         struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
 832
 833         si476x_core_lock(radio->core);
 834
 835         switch (ctrl->id) {
 836         case V4L2_CID_SI476X_INTERCHIP_LINK:
 837                 if (si476x_core_has_diversity(radio->core)) {
 838                         if (radio->ops->phase_diversity) {
 839                                 retval = radio->ops->phase_div_status(radio->core);
 840                                 if (retval < 0)
 841                                         break;
 842
 843                                 ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
 844                                 retval = 0;
 845                                 break;
 846                         } else {
 847                                 retval = -ENOTTY;
 848                                 break;
 849                         }
 850                 }
 851                 retval = -EINVAL;
 852                 break;
 853         default:
 854                 retval = -EINVAL;
 855                 break;
 856         }
 857         si476x_core_unlock(radio->core);
 858         return retval;
 859
 860 }
 861
 862 static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
 863 {
 864         int retval;
 865         enum si476x_phase_diversity_mode mode;
 866         struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
 867
 868         si476x_core_lock(radio->core);
 869
 870         switch (ctrl->id) {
 871         case V4L2_CID_SI476X_HARMONICS_COUNT:
 872                 retval = regmap_update_bits(radio->core->regmap,
 873                                             SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 874                                             SI476X_PROP_PWR_HARMONICS_MASK,
 875                                             ctrl->val);
 876                 break;
 877         case V4L2_CID_POWER_LINE_FREQUENCY:
 878                 switch (ctrl->val) {
 879                 case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
 880                         retval = regmap_update_bits(radio->core->regmap,
 881                                                     SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 882                                                     SI476X_PROP_PWR_ENABLE_MASK,
 883                                                     0);
 884                         break;
 885                 case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
 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_50HZ);
 890                         break;
 891                 case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
 892                         retval = regmap_update_bits(radio->core->regmap,
 893                                                     SI476X_PROP_AUDIO_PWR_LINE_FILTER,
 894                                                     SI476X_PROP_PWR_GRID_MASK,
 895                                                     SI476X_PROP_PWR_GRID_60HZ);
 896                         break;
 897                 default:
 898                         retval = -EINVAL;
 899                         break;
 900                 }
 901                 break;
 902         case V4L2_CID_SI476X_RSSI_THRESHOLD:
 903                 retval = regmap_write(radio->core->regmap,
 904                                       SI476X_PROP_VALID_RSSI_THRESHOLD,
 905                                       ctrl->val);
 906                 break;
 907         case V4L2_CID_SI476X_SNR_THRESHOLD:
 908                 retval = regmap_write(radio->core->regmap,
 909                                       SI476X_PROP_VALID_SNR_THRESHOLD,
 910                                       ctrl->val);
 911                 break;
 912         case V4L2_CID_SI476X_MAX_TUNE_ERROR:
 913                 retval = regmap_write(radio->core->regmap,
 914                                       SI476X_PROP_VALID_MAX_TUNE_ERROR,
 915                                       ctrl->val);
 916                 break;
 917         case V4L2_CID_RDS_RECEPTION:
 918                 /*
 919                  * It looks like RDS related properties are
 920                  * inaccesable when tuner is in AM mode, so cache the
 921                  * changes
 922                  */
 923                 if (si476x_core_is_in_am_receiver_mode(radio->core))
 924                         regcache_cache_only(radio->core->regmap, true);
 925
 926                 if (ctrl->val) {
 927                         retval = regmap_write(radio->core->regmap,
 928                                               SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT,
 929                                               radio->core->rds_fifo_depth);
 930                         if (retval < 0)
 931                                 break;
 932
 933                         if (radio->core->client->irq) {
 934                                 retval = regmap_write(radio->core->regmap,
 935                                                       SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
 936                                                       SI476X_RDSRECV);
 937                                 if (retval < 0)
 938                                         break;
 939                         }
 940
 941                         /* Drain RDS FIFO before enabling RDS processing */
 942                         retval = si476x_core_cmd_fm_rds_status(radio->core,
 943                                                                false,
 944                                                                true,
 945                                                                true,
 946                                                                NULL);
 947                         if (retval < 0)
 948                                 break;
 949
 950                         retval = regmap_update_bits(radio->core->regmap,
 951                                                     SI476X_PROP_FM_RDS_CONFIG,
 952                                                     SI476X_PROP_RDSEN_MASK,
 953                                                     SI476X_PROP_RDSEN);
 954                 } else {
 955                         retval = regmap_update_bits(radio->core->regmap,
 956                                                     SI476X_PROP_FM_RDS_CONFIG,
 957                                                     SI476X_PROP_RDSEN_MASK,
 958                                                     !SI476X_PROP_RDSEN);
 959                 }
 960
 961                 if (si476x_core_is_in_am_receiver_mode(radio->core))
 962                         regcache_cache_only(radio->core->regmap, false);
 963                 break;
 964         case V4L2_CID_TUNE_DEEMPHASIS:
 965                 retval = regmap_write(radio->core->regmap,
 966                                       SI476X_PROP_AUDIO_DEEMPHASIS,
 967                                       ctrl->val);
 968                 break;
 969
 970         case V4L2_CID_SI476X_DIVERSITY_MODE:
 971                 mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
 972
 973                 if (mode == radio->core->diversity_mode) {
 974                         retval = 0;
 975                         break;
 976                 }
 977
 978                 if (si476x_core_is_in_am_receiver_mode(radio->core)) {
 979                         /*
 980                          * Diversity cannot be configured while tuner
 981                          * is in AM mode so save the changes and carry on.
 982                          */
 983                         radio->core->diversity_mode = mode;
 984                         retval = 0;
 985                 } else {
 986                         retval = radio->ops->phase_diversity(radio->core, mode);
 987                         if (!retval)
 988                                 radio->core->diversity_mode = mode;
 989                 }
 990                 break;
 991
 992         default:
 993                 retval = -EINVAL;
 994                 break;
 995         }
 996
 997         si476x_core_unlock(radio->core);
 998
 999         return retval;
1000 }
1001
1002 #ifdef CONFIG_VIDEO_ADV_DEBUG
1003 static int si476x_radio_g_register(struct file *file, void *fh,
1004                                    struct v4l2_dbg_register *reg)
1005 {
1006         int err;
1007         unsigned int value;
1008         struct si476x_radio *radio = video_drvdata(file);
1009
1010         si476x_core_lock(radio->core);
1011         reg->size = 2;
1012         err = regmap_read(radio->core->regmap,
1013                           (unsigned int)reg->reg, &value);
1014         reg->val = value;
1015         si476x_core_unlock(radio->core);
1016
1017         return err;
1018 }
1019 static int si476x_radio_s_register(struct file *file, void *fh,
1020                                    const struct v4l2_dbg_register *reg)
1021 {
1022
1023         int err;
1024         struct si476x_radio *radio = video_drvdata(file);
1025
1026         si476x_core_lock(radio->core);
1027         err = regmap_write(radio->core->regmap,
1028                            (unsigned int)reg->reg,
1029                            (unsigned int)reg->val);
1030         si476x_core_unlock(radio->core);
1031
1032         return err;
1033 }
1034 #endif
1035
1036 static int si476x_radio_fops_open(struct file *file)
1037 {
1038         struct si476x_radio *radio = video_drvdata(file);
1039         int err;
1040
1041         err = v4l2_fh_open(file);
1042         if (err)
1043                 return err;
1044
1045         if (v4l2_fh_is_singular_file(file)) {
1046                 si476x_core_lock(radio->core);
1047                 err = si476x_core_set_power_state(radio->core,
1048                                                   SI476X_POWER_UP_FULL);
1049                 if (err < 0)
1050                         goto done;
1051
1052                 err = si476x_radio_do_post_powerup_init(radio,
1053                                                         radio->core->power_up_parameters.func);
1054                 if (err < 0)
1055                         goto power_down;
1056
1057                 err = si476x_radio_pretune(radio,
1058                                            radio->core->power_up_parameters.func);
1059                 if (err < 0)
1060                         goto power_down;
1061
1062                 si476x_core_unlock(radio->core);
1063                 /*Must be done after si476x_core_unlock to prevent a deadlock*/
1064                 v4l2_ctrl_handler_setup(&radio->ctrl_handler);
1065         }
1066
1067         return err;
1068
1069 power_down:
1070         si476x_core_set_power_state(radio->core,
1071                                     SI476X_POWER_DOWN);
1072 done:
1073         si476x_core_unlock(radio->core);
1074         v4l2_fh_release(file);
1075
1076         return err;
1077 }
1078
1079 static int si476x_radio_fops_release(struct file *file)
1080 {
1081         int err;
1082         struct si476x_radio *radio = video_drvdata(file);
1083
1084         if (v4l2_fh_is_singular_file(file) &&
1085             atomic_read(&radio->core->is_alive))
1086                 si476x_core_set_power_state(radio->core,
1087                                             SI476X_POWER_DOWN);
1088
1089         err = v4l2_fh_release(file);
1090
1091         return err;
1092 }
1093
1094 static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
1095                                       size_t count, loff_t *ppos)
1096 {
1097         ssize_t      rval;
1098         size_t       fifo_len;
1099         unsigned int copied;
1100
1101         struct si476x_radio *radio = video_drvdata(file);
1102
1103         /* block if no new data available */
1104         if (kfifo_is_empty(&radio->core->rds_fifo)) {
1105                 if (file->f_flags & O_NONBLOCK)
1106                         return -EWOULDBLOCK;
1107
1108                 rval = wait_event_interruptible(radio->core->rds_read_queue,
1109                                                 (!kfifo_is_empty(&radio->core->rds_fifo) ||
1110                                                  !atomic_read(&radio->core->is_alive)));
1111                 if (rval < 0)
1112                         return -EINTR;
1113
1114                 if (!atomic_read(&radio->core->is_alive))
1115                         return -ENODEV;
1116         }
1117
1118         fifo_len = kfifo_len(&radio->core->rds_fifo);
1119
1120         if (kfifo_to_user(&radio->core->rds_fifo, buf,
1121                           min(fifo_len, count),
1122                           &copied) != 0) {
1123                 dev_warn(&radio->videodev.dev,
1124                          "Error during FIFO to userspace copy\n");
1125                 rval = -EIO;
1126         } else {
1127                 rval = (ssize_t)copied;
1128         }
1129
1130         return rval;
1131 }
1132
1133 static __poll_t si476x_radio_fops_poll(struct file *file,
1134                                 struct poll_table_struct *pts)
1135 {
1136         struct si476x_radio *radio = video_drvdata(file);
1137         __poll_t req_events = poll_requested_events(pts);
1138         __poll_t err = v4l2_ctrl_poll(file, pts);
1139
1140         if (req_events & (EPOLLIN | EPOLLRDNORM)) {
1141                 if (atomic_read(&radio->core->is_alive))
1142                         poll_wait(file, &radio->core->rds_read_queue, pts);
1143
1144                 if (!atomic_read(&radio->core->is_alive))
1145                         err = EPOLLHUP;
1146
1147                 if (!kfifo_is_empty(&radio->core->rds_fifo))
1148                         err = EPOLLIN | EPOLLRDNORM;
1149         }
1150
1151         return err;
1152 }
1153
1154 static const struct v4l2_file_operations si476x_fops = {
1155         .owner                  = THIS_MODULE,
1156         .read                   = si476x_radio_fops_read,
1157         .poll                   = si476x_radio_fops_poll,
1158         .unlocked_ioctl         = video_ioctl2,
1159         .open                   = si476x_radio_fops_open,
1160         .release                = si476x_radio_fops_release,
1161 };
1162
1163
1164 static const struct v4l2_ioctl_ops si4761_ioctl_ops = {
1165         .vidioc_querycap                = si476x_radio_querycap,
1166         .vidioc_g_tuner                 = si476x_radio_g_tuner,
1167         .vidioc_s_tuner                 = si476x_radio_s_tuner,
1168
1169         .vidioc_g_frequency             = si476x_radio_g_frequency,
1170         .vidioc_s_frequency             = si476x_radio_s_frequency,
1171         .vidioc_s_hw_freq_seek          = si476x_radio_s_hw_freq_seek,
1172         .vidioc_enum_freq_bands         = si476x_radio_enum_freq_bands,
1173
1174         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
1175         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
1176
1177 #ifdef CONFIG_VIDEO_ADV_DEBUG
1178         .vidioc_g_register              = si476x_radio_g_register,
1179         .vidioc_s_register              = si476x_radio_s_register,
1180 #endif
1181 };
1182
1183
1184 static const struct video_device si476x_viddev_template = {
1185         .fops                   = &si476x_fops,
1186         .name                   = DRIVER_NAME,
1187         .release                = video_device_release_empty,
1188 };
1189
1190
1191
1192 static ssize_t si476x_radio_read_acf_blob(struct file *file,
1193                                           char __user *user_buf,
1194                                           size_t count, loff_t *ppos)
1195 {
1196         int err;
1197         struct si476x_radio *radio = file->private_data;
1198         struct si476x_acf_status_report report;
1199
1200         si476x_core_lock(radio->core);
1201         if (radio->ops->acf_status)
1202                 err = radio->ops->acf_status(radio->core, &report);
1203         else
1204                 err = -ENOENT;
1205         si476x_core_unlock(radio->core);
1206
1207         if (err < 0)
1208                 return err;
1209
1210         return simple_read_from_buffer(user_buf, count, ppos, &report,
1211                                        sizeof(report));
1212 }
1213
1214 static const struct file_operations radio_acf_fops = {
1215         .open   = simple_open,
1216         .llseek = default_llseek,
1217         .read   = si476x_radio_read_acf_blob,
1218 };
1219
1220 static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file,
1221                                                   char __user *user_buf,
1222                                                   size_t count, loff_t *ppos)
1223 {
1224         int err;
1225         struct si476x_radio *radio = file->private_data;
1226         struct si476x_rds_blockcount_report report;
1227
1228         si476x_core_lock(radio->core);
1229         if (radio->ops->rds_blckcnt)
1230                 err = radio->ops->rds_blckcnt(radio->core, true,
1231                                                &report);
1232         else
1233                 err = -ENOENT;
1234         si476x_core_unlock(radio->core);
1235
1236         if (err < 0)
1237                 return err;
1238
1239         return simple_read_from_buffer(user_buf, count, ppos, &report,
1240                                        sizeof(report));
1241 }
1242
1243 static const struct file_operations radio_rds_blckcnt_fops = {
1244         .open   = simple_open,
1245         .llseek = default_llseek,
1246         .read   = si476x_radio_read_rds_blckcnt_blob,
1247 };
1248
1249 static ssize_t si476x_radio_read_agc_blob(struct file *file,
1250                                           char __user *user_buf,
1251                                           size_t count, loff_t *ppos)
1252 {
1253         int err;
1254         struct si476x_radio *radio = file->private_data;
1255         struct si476x_agc_status_report report;
1256
1257         si476x_core_lock(radio->core);
1258         if (radio->ops->rds_blckcnt)
1259                 err = radio->ops->agc_status(radio->core, &report);
1260         else
1261                 err = -ENOENT;
1262         si476x_core_unlock(radio->core);
1263
1264         if (err < 0)
1265                 return err;
1266
1267         return simple_read_from_buffer(user_buf, count, ppos, &report,
1268                                        sizeof(report));
1269 }
1270
1271 static const struct file_operations radio_agc_fops = {
1272         .open   = simple_open,
1273         .llseek = default_llseek,
1274         .read   = si476x_radio_read_agc_blob,
1275 };
1276
1277 static ssize_t si476x_radio_read_rsq_blob(struct file *file,
1278                                           char __user *user_buf,
1279                                           size_t count, loff_t *ppos)
1280 {
1281         int err;
1282         struct si476x_radio *radio = file->private_data;
1283         struct si476x_rsq_status_report report;
1284         struct si476x_rsq_status_args args = {
1285                 .primary        = false,
1286                 .rsqack         = false,
1287                 .attune         = false,
1288                 .cancel         = false,
1289                 .stcack         = false,
1290         };
1291
1292         si476x_core_lock(radio->core);
1293         if (radio->ops->rds_blckcnt)
1294                 err = radio->ops->rsq_status(radio->core, &args, &report);
1295         else
1296                 err = -ENOENT;
1297         si476x_core_unlock(radio->core);
1298
1299         if (err < 0)
1300                 return err;
1301
1302         return simple_read_from_buffer(user_buf, count, ppos, &report,
1303                                        sizeof(report));
1304 }
1305
1306 static const struct file_operations radio_rsq_fops = {
1307         .open   = simple_open,
1308         .llseek = default_llseek,
1309         .read   = si476x_radio_read_rsq_blob,
1310 };
1311
1312 static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file,
1313                                                   char __user *user_buf,
1314                                                   size_t count, loff_t *ppos)
1315 {
1316         int err;
1317         struct si476x_radio *radio = file->private_data;
1318         struct si476x_rsq_status_report report;
1319         struct si476x_rsq_status_args args = {
1320                 .primary        = true,
1321                 .rsqack         = false,
1322                 .attune         = false,
1323                 .cancel         = false,
1324                 .stcack         = false,
1325         };
1326
1327         si476x_core_lock(radio->core);
1328         if (radio->ops->rds_blckcnt)
1329                 err = radio->ops->rsq_status(radio->core, &args, &report);
1330         else
1331                 err = -ENOENT;
1332         si476x_core_unlock(radio->core);
1333
1334         if (err < 0)
1335                 return err;
1336
1337         return simple_read_from_buffer(user_buf, count, ppos, &report,
1338                                        sizeof(report));
1339 }
1340
1341 static const struct file_operations radio_rsq_primary_fops = {
1342         .open   = simple_open,
1343         .llseek = default_llseek,
1344         .read   = si476x_radio_read_rsq_primary_blob,
1345 };
1346
1347
1348 static int si476x_radio_init_debugfs(struct si476x_radio *radio)
1349 {
1350         struct dentry   *dentry;
1351         int             ret;
1352
1353         dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL);
1354         if (IS_ERR(dentry)) {
1355                 ret = PTR_ERR(dentry);
1356                 goto exit;
1357         }
1358         radio->debugfs = dentry;
1359
1360         dentry = debugfs_create_file("acf", S_IRUGO,
1361                                      radio->debugfs, radio, &radio_acf_fops);
1362         if (IS_ERR(dentry)) {
1363                 ret = PTR_ERR(dentry);
1364                 goto cleanup;
1365         }
1366
1367         dentry = debugfs_create_file("rds_blckcnt", S_IRUGO,
1368                                      radio->debugfs, radio,
1369                                      &radio_rds_blckcnt_fops);
1370         if (IS_ERR(dentry)) {
1371                 ret = PTR_ERR(dentry);
1372                 goto cleanup;
1373         }
1374
1375         dentry = debugfs_create_file("agc", S_IRUGO,
1376                                      radio->debugfs, radio, &radio_agc_fops);
1377         if (IS_ERR(dentry)) {
1378                 ret = PTR_ERR(dentry);
1379                 goto cleanup;
1380         }
1381
1382         dentry = debugfs_create_file("rsq", S_IRUGO,
1383                                      radio->debugfs, radio, &radio_rsq_fops);
1384         if (IS_ERR(dentry)) {
1385                 ret = PTR_ERR(dentry);
1386                 goto cleanup;
1387         }
1388
1389         dentry = debugfs_create_file("rsq_primary", S_IRUGO,
1390                                      radio->debugfs, radio,
1391                                      &radio_rsq_primary_fops);
1392         if (IS_ERR(dentry)) {
1393                 ret = PTR_ERR(dentry);
1394                 goto cleanup;
1395         }
1396
1397         return 0;
1398 cleanup:
1399         debugfs_remove_recursive(radio->debugfs);
1400 exit:
1401         return ret;
1402 }
1403
1404
1405 static int si476x_radio_add_new_custom(struct si476x_radio *radio,
1406                                        enum si476x_ctrl_idx idx)
1407 {
1408         int rval;
1409         struct v4l2_ctrl *ctrl;
1410
1411         ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
1412                                     &si476x_ctrls[idx],
1413                                     NULL);
1414         rval = radio->ctrl_handler.error;
1415         if (ctrl == NULL && rval)
1416                 dev_err(radio->v4l2dev.dev,
1417                         "Could not initialize '%s' control %d\n",
1418                         si476x_ctrls[idx].name, rval);
1419
1420         return rval;
1421 }
1422
1423 static int si476x_radio_probe(struct platform_device *pdev)
1424 {
1425         int rval;
1426         struct si476x_radio *radio;
1427         struct v4l2_ctrl *ctrl;
1428
1429         static atomic_t instance = ATOMIC_INIT(0);
1430
1431         radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
1432         if (!radio)
1433                 return -ENOMEM;
1434
1435         radio->core = i2c_mfd_cell_to_core(&pdev->dev);
1436
1437         v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
1438
1439         rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
1440         if (rval) {
1441                 dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
1442                 return rval;
1443         }
1444
1445         memcpy(&radio->videodev, &si476x_viddev_template,
1446                sizeof(struct video_device));
1447
1448         radio->videodev.v4l2_dev  = &radio->v4l2dev;
1449         radio->videodev.ioctl_ops = &si4761_ioctl_ops;
1450         radio->videodev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
1451                                       V4L2_CAP_HW_FREQ_SEEK;
1452
1453         si476x_core_lock(radio->core);
1454         if (!si476x_core_is_a_secondary_tuner(radio->core))
1455                 radio->videodev.device_caps |= V4L2_CAP_RDS_CAPTURE |
1456                                                V4L2_CAP_READWRITE;
1457         si476x_core_unlock(radio->core);
1458
1459         video_set_drvdata(&radio->videodev, radio);
1460         platform_set_drvdata(pdev, radio);
1461
1462
1463         radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
1464         v4l2_ctrl_handler_init(&radio->ctrl_handler,
1465                                1 + ARRAY_SIZE(si476x_ctrls));
1466
1467         if (si476x_core_has_am(radio->core)) {
1468                 ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1469                                               &si476x_ctrl_ops,
1470                                               V4L2_CID_POWER_LINE_FREQUENCY,
1471                                               V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
1472                                               0, 0);
1473                 rval = radio->ctrl_handler.error;
1474                 if (ctrl == NULL && rval) {
1475                         dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
1476                                 rval);
1477                         goto exit;
1478                 }
1479
1480                 rval = si476x_radio_add_new_custom(radio,
1481                                                    SI476X_IDX_HARMONICS_COUNT);
1482                 if (rval < 0)
1483                         goto exit;
1484         }
1485
1486         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
1487         if (rval < 0)
1488                 goto exit;
1489
1490         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
1491         if (rval < 0)
1492                 goto exit;
1493
1494         rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
1495         if (rval < 0)
1496                 goto exit;
1497
1498         ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
1499                                       &si476x_ctrl_ops,
1500                                       V4L2_CID_TUNE_DEEMPHASIS,
1501                                       V4L2_DEEMPHASIS_75_uS, 0, 0);
1502         rval = radio->ctrl_handler.error;
1503         if (ctrl == NULL && rval) {
1504                 dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
1505                         rval);
1506                 goto exit;
1507         }
1508
1509         ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
1510                                  V4L2_CID_RDS_RECEPTION,
1511                                  0, 1, 1, 1);
1512         rval = radio->ctrl_handler.error;
1513         if (ctrl == NULL && rval) {
1514                 dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
1515                         rval);
1516                 goto exit;
1517         }
1518
1519         if (si476x_core_has_diversity(radio->core)) {
1520                 si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
1521                         si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
1522                 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE);
1523                 if (rval < 0)
1524                         goto exit;
1525
1526                 rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK);
1527                 if (rval < 0)
1528                         goto exit;
1529         }
1530
1531         /* register video device */
1532         rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
1533         if (rval < 0) {
1534                 dev_err(&pdev->dev, "Could not register video device\n");
1535                 goto exit;
1536         }
1537
1538         rval = si476x_radio_init_debugfs(radio);
1539         if (rval < 0) {
1540                 dev_err(&pdev->dev, "Could not create debugfs interface\n");
1541                 goto exit;
1542         }
1543
1544         return 0;
1545 exit:
1546         v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1547         return rval;
1548 }
1549
1550 static int si476x_radio_remove(struct platform_device *pdev)
1551 {
1552         struct si476x_radio *radio = platform_get_drvdata(pdev);
1553
1554         v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
1555         video_unregister_device(&radio->videodev);
1556         v4l2_device_unregister(&radio->v4l2dev);
1557         debugfs_remove_recursive(radio->debugfs);
1558
1559         return 0;
1560 }
1561
1562 MODULE_ALIAS("platform:si476x-radio");
1563
1564 static struct platform_driver si476x_radio_driver = {
1565         .driver         = {
1566                 .name   = DRIVER_NAME,
1567         },
1568         .probe          = si476x_radio_probe,
1569         .remove         = si476x_radio_remove,
1570 };
1571 module_platform_driver(si476x_radio_driver);
1572
1573 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
1574 MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
1575 MODULE_LICENSE("GPL");