root/include/linux/mfd/si476x-core.h

INCLUDED FROM

DEFINITIONS

1. i2c_mfd_cell_to_core
2. si476x_core_lock
3. si476x_core_unlock
4. hz_to_si476x
5. si476x_to_hz
6. hz_to_v4l2
7. v4l2_to_hz
8. v4l2_to_si476x
9. si476x_to_v4l2

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * include/media/si476x-core.h -- Common definitions for si476x core
   4  * device
   5  *
   6  * Copyright (C) 2012 Innovative Converged Devices(ICD)
   7  * Copyright (C) 2013 Andrey Smirnov
   8  *
   9  * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
  10  */
  11 
  12 #ifndef SI476X_CORE_H
  13 #define SI476X_CORE_H
  14 
  15 #include <linux/kfifo.h>
  16 #include <linux/atomic.h>
  17 #include <linux/i2c.h>
  18 #include <linux/regmap.h>
  19 #include <linux/mutex.h>
  20 #include <linux/mfd/core.h>
  21 #include <linux/videodev2.h>
  22 #include <linux/regulator/consumer.h>
  23 
  24 #include <linux/mfd/si476x-platform.h>
  25 #include <linux/mfd/si476x-reports.h>
  26 
  27 /* Command Timeouts */
  28 #define SI476X_DEFAULT_TIMEOUT  100000
  29 #define SI476X_TIMEOUT_TUNE     700000
  30 #define SI476X_TIMEOUT_POWER_UP 330000
  31 #define SI476X_STATUS_POLL_US   0
  32 
  33 /* -------------------- si476x-i2c.c ----------------------- */
  34 
  35 enum si476x_freq_supported_chips {
  36         SI476X_CHIP_SI4761 = 1,
  37         SI476X_CHIP_SI4764,
  38         SI476X_CHIP_SI4768,
  39 };
  40 
  41 enum si476x_part_revisions {
  42         SI476X_REVISION_A10 = 0,
  43         SI476X_REVISION_A20 = 1,
  44         SI476X_REVISION_A30 = 2,
  45 };
  46 
  47 enum si476x_mfd_cells {
  48         SI476X_RADIO_CELL = 0,
  49         SI476X_CODEC_CELL,
  50         SI476X_MFD_CELLS,
  51 };
  52 
  53 /**
  54  * enum si476x_power_state - possible power state of the si476x
  55  * device.
  56  *
  57  * @SI476X_POWER_DOWN: In this state all regulators are turned off
  58  * and the reset line is pulled low. The device is completely
  59  * inactive.
  60  * @SI476X_POWER_UP_FULL: In this state all the power regualtors are
  61  * turned on, reset line pulled high, IRQ line is enabled(polling is
  62  * active for polling use scenario) and device is turned on with
  63  * POWER_UP command. The device is ready to be used.
  64  * @SI476X_POWER_INCONSISTENT: This state indicates that previous
  65  * power down was inconsistent, meaning some of the regulators were
  66  * not turned down and thus use of the device, without power-cycling
  67  * is impossible.
  68  */
  69 enum si476x_power_state {
  70         SI476X_POWER_DOWN               = 0,
  71         SI476X_POWER_UP_FULL            = 1,
  72         SI476X_POWER_INCONSISTENT       = 2,
  73 };
  74 
  75 /**
  76  * struct si476x_core - internal data structure representing the
  77  * underlying "core" device which all the MFD cell-devices use.
  78  *
  79  * @client: Actual I2C client used to transfer commands to the chip.
  80  * @chip_id: Last digit of the chip model(E.g. "1" for SI4761)
  81  * @cells: MFD cell devices created by this driver.
  82  * @cmd_lock: Mutex used to serialize all the requests to the core
  83  * device. This filed should not be used directly. Instead
  84  * si476x_core_lock()/si476x_core_unlock() should be used to get
  85  * exclusive access to the "core" device.
  86  * @users: Active users counter(Used by the radio cell)
  87  * @rds_read_queue: Wait queue used to wait for RDS data.
  88  * @rds_fifo: FIFO in which all the RDS data received from the chip is
  89  * placed.
  90  * @rds_fifo_drainer: Worker that drains on-chip RDS FIFO.
  91  * @rds_drainer_is_working: Flag used for launching only one instance
  92  * of the @rds_fifo_drainer.
  93  * @rds_drainer_status_lock: Lock used to guard access to the
  94  * @rds_drainer_is_working variable.
  95  * @command: Wait queue for wainting on the command comapletion.
  96  * @cts: Clear To Send flag set upon receiving first status with CTS
  97  * set.
  98  * @tuning: Wait queue used for wainting for tune/seek comand
  99  * completion.
 100  * @stc: Similar to @cts, but for the STC bit of the status value.
 101  * @power_up_parameters: Parameters used as argument for POWER_UP
 102  * command when the device is started.
 103  * @state: Current power state of the device.
 104  * @supplues: Structure containing handles to all power supplies used
 105  * by the device (NULL ones are ignored).
 106  * @gpio_reset: GPIO pin connectet to the RSTB pin of the chip.
 107  * @pinmux: Chip's configurable pins configuration.
 108  * @diversity_mode: Chips role when functioning in diversity mode.
 109  * @status_monitor: Polling worker used in polling use case scenarion
 110  * (when IRQ is not avalible).
 111  * @revision: Chip's running firmware revision number(Used for correct
 112  * command set support).
 113  */
 114 
 115 struct si476x_core {
 116         struct i2c_client *client;
 117         struct regmap *regmap;
 118         int chip_id;
 119         struct mfd_cell cells[SI476X_MFD_CELLS];
 120 
 121         struct mutex cmd_lock; /* for serializing fm radio operations */
 122         atomic_t users;
 123 
 124         wait_queue_head_t  rds_read_queue;
 125         struct kfifo       rds_fifo;
 126         struct work_struct rds_fifo_drainer;
 127         bool               rds_drainer_is_working;
 128         struct mutex       rds_drainer_status_lock;
 129 
 130         wait_queue_head_t command;
 131         atomic_t          cts;
 132 
 133         wait_queue_head_t tuning;
 134         atomic_t          stc;
 135 
 136         struct si476x_power_up_args power_up_parameters;
 137 
 138         enum si476x_power_state power_state;
 139 
 140         struct regulator_bulk_data supplies[4];
 141 
 142         int gpio_reset;
 143 
 144         struct si476x_pinmux pinmux;
 145         enum si476x_phase_diversity_mode diversity_mode;
 146 
 147         atomic_t is_alive;
 148 
 149         struct delayed_work status_monitor;
 150 #define SI476X_WORK_TO_CORE(w) container_of(to_delayed_work(w), \
 151                                             struct si476x_core, \
 152                                             status_monitor)
 153 
 154         int revision;
 155 
 156         int rds_fifo_depth;
 157 };
 158 
 159 static inline struct si476x_core *i2c_mfd_cell_to_core(struct device *dev)
 160 {
 161         struct i2c_client *client = to_i2c_client(dev->parent);
 162         return i2c_get_clientdata(client);
 163 }
 164 
 165 
 166 /**
 167  * si476x_core_lock() - lock the core device to get an exclusive access
 168  * to it.
 169  */
 170 static inline void si476x_core_lock(struct si476x_core *core)
 171 {
 172         mutex_lock(&core->cmd_lock);
 173 }
 174 
 175 /**
 176  * si476x_core_unlock() - unlock the core device to relinquish an
 177  * exclusive access to it.
 178  */
 179 static inline void si476x_core_unlock(struct si476x_core *core)
 180 {
 181         mutex_unlock(&core->cmd_lock);
 182 }
 183 
 184 /* *_TUNE_FREQ family of commands accept frequency in multiples of
 185     10kHz */
 186 static inline u16 hz_to_si476x(struct si476x_core *core, int freq)
 187 {
 188         u16 result;
 189 
 190         switch (core->power_up_parameters.func) {
 191         default:
 192         case SI476X_FUNC_FM_RECEIVER:
 193                 result = freq / 10000;
 194                 break;
 195         case SI476X_FUNC_AM_RECEIVER:
 196                 result = freq / 1000;
 197                 break;
 198         }
 199 
 200         return result;
 201 }
 202 
 203 static inline int si476x_to_hz(struct si476x_core *core, u16 freq)
 204 {
 205         int result;
 206 
 207         switch (core->power_up_parameters.func) {
 208         default:
 209         case SI476X_FUNC_FM_RECEIVER:
 210                 result = freq * 10000;
 211                 break;
 212         case SI476X_FUNC_AM_RECEIVER:
 213                 result = freq * 1000;
 214                 break;
 215         }
 216 
 217         return result;
 218 }
 219 
 220 /* Since the V4L2_TUNER_CAP_LOW flag is supplied, V4L2 subsystem
 221  * mesures frequency in 62.5 Hz units */
 222 
 223 static inline int hz_to_v4l2(int freq)
 224 {
 225         return (freq * 10) / 625;
 226 }
 227 
 228 static inline int v4l2_to_hz(int freq)
 229 {
 230         return (freq * 625) / 10;
 231 }
 232 
 233 static inline u16 v4l2_to_si476x(struct si476x_core *core, int freq)
 234 {
 235         return hz_to_si476x(core, v4l2_to_hz(freq));
 236 }
 237 
 238 static inline int si476x_to_v4l2(struct si476x_core *core, u16 freq)
 239 {
 240         return hz_to_v4l2(si476x_to_hz(core, freq));
 241 }
 242 
 243 
 244 
 245 /**
 246  * struct si476x_func_info - structure containing result of the
 247  * FUNC_INFO command.
 248  *
 249  * @firmware.major: Firmware major number.
 250  * @firmware.minor[...]: Firmware minor numbers.
 251  * @patch_id:
 252  * @func: Mode tuner is working in.
 253  */
 254 struct si476x_func_info {
 255         struct {
 256                 u8 major, minor[2];
 257         } firmware;
 258         u16 patch_id;
 259         enum si476x_func func;
 260 };
 261 
 262 /**
 263  * struct si476x_power_down_args - structure used to pass parameters
 264  * to POWER_DOWN command
 265  *
 266  * @xosc: true - Power down, but leav oscillator running.
 267  *        false - Full power down.
 268  */
 269 struct si476x_power_down_args {
 270         bool xosc;
 271 };
 272 
 273 /**
 274  * enum si476x_tunemode - enum representing possible tune modes for
 275  * the chip.
 276  * @SI476X_TM_VALIDATED_NORMAL_TUNE: Unconditionally stay on the new
 277  * channel after tune, tune status is valid.
 278  * @SI476X_TM_INVALIDATED_FAST_TUNE: Unconditionally stay in the new
 279  * channel after tune, tune status invalid.
 280  * @SI476X_TM_VALIDATED_AF_TUNE: Jump back to previous channel if
 281  * metric thresholds are not met.
 282  * @SI476X_TM_VALIDATED_AF_CHECK: Unconditionally jump back to the
 283  * previous channel.
 284  */
 285 enum si476x_tunemode {
 286         SI476X_TM_VALIDATED_NORMAL_TUNE = 0,
 287         SI476X_TM_INVALIDATED_FAST_TUNE = 1,
 288         SI476X_TM_VALIDATED_AF_TUNE     = 2,
 289         SI476X_TM_VALIDATED_AF_CHECK    = 3,
 290 };
 291 
 292 /**
 293  * enum si476x_smoothmetrics - enum containing the possible setting fo
 294  * audio transitioning of the chip
 295  * @SI476X_SM_INITIALIZE_AUDIO: Initialize audio state to match this
 296  * new channel
 297  * @SI476X_SM_TRANSITION_AUDIO: Transition audio state from previous
 298  * channel values to the new values
 299  */
 300 enum si476x_smoothmetrics {
 301         SI476X_SM_INITIALIZE_AUDIO = 0,
 302         SI476X_SM_TRANSITION_AUDIO = 1,
 303 };
 304 
 305 /**
 306  * struct si476x_rds_status_report - the structure representing the
 307  * response to 'FM_RD_STATUS' command
 308  * @rdstpptyint: Traffic program flag(TP) and/or program type(PTY)
 309  * code has changed.
 310  * @rdspiint: Program identification(PI) code has changed.
 311  * @rdssyncint: RDS synchronization has changed.
 312  * @rdsfifoint: RDS was received and the RDS FIFO has at least
 313  * 'FM_RDS_INTERRUPT_FIFO_COUNT' elements in it.
 314  * @tpptyvalid: TP flag and PTY code are valid falg.
 315  * @pivalid: PI code is valid flag.
 316  * @rdssync: RDS is currently synchronized.
 317  * @rdsfifolost: On or more RDS groups have been lost/discarded flag.
 318  * @tp: Current channel's TP flag.
 319  * @pty: Current channel's PTY code.
 320  * @pi: Current channel's PI code.
 321  * @rdsfifoused: Number of blocks remaining in the RDS FIFO (0 if
 322  * empty).
 323  */
 324 struct si476x_rds_status_report {
 325         bool rdstpptyint, rdspiint, rdssyncint, rdsfifoint;
 326         bool tpptyvalid, pivalid, rdssync, rdsfifolost;
 327         bool tp;
 328 
 329         u8 pty;
 330         u16 pi;
 331 
 332         u8 rdsfifoused;
 333         u8 ble[4];
 334 
 335         struct v4l2_rds_data rds[4];
 336 };
 337 
 338 struct si476x_rsq_status_args {
 339         bool primary;
 340         bool rsqack;
 341         bool attune;
 342         bool cancel;
 343         bool stcack;
 344 };
 345 
 346 enum si476x_injside {
 347         SI476X_INJSIDE_AUTO     = 0,
 348         SI476X_INJSIDE_LOW      = 1,
 349         SI476X_INJSIDE_HIGH     = 2,
 350 };
 351 
 352 struct si476x_tune_freq_args {
 353         bool zifsr;
 354         bool hd;
 355         enum si476x_injside injside;
 356         int freq;
 357         enum si476x_tunemode tunemode;
 358         enum si476x_smoothmetrics smoothmetrics;
 359         int antcap;
 360 };
 361 
 362 int  si476x_core_stop(struct si476x_core *, bool);
 363 int  si476x_core_start(struct si476x_core *, bool);
 364 int  si476x_core_set_power_state(struct si476x_core *, enum si476x_power_state);
 365 bool si476x_core_has_am(struct si476x_core *);
 366 bool si476x_core_has_diversity(struct si476x_core *);
 367 bool si476x_core_is_a_secondary_tuner(struct si476x_core *);
 368 bool si476x_core_is_a_primary_tuner(struct si476x_core *);
 369 bool si476x_core_is_in_am_receiver_mode(struct si476x_core *core);
 370 bool si476x_core_is_powered_up(struct si476x_core *core);
 371 
 372 enum si476x_i2c_type {
 373         SI476X_I2C_SEND,
 374         SI476X_I2C_RECV
 375 };
 376 
 377 int si476x_core_i2c_xfer(struct si476x_core *,
 378                          enum si476x_i2c_type,
 379                          char *, int);
 380 
 381 
 382 /* -------------------- si476x-cmd.c ----------------------- */
 383 
 384 int si476x_core_cmd_func_info(struct si476x_core *, struct si476x_func_info *);
 385 int si476x_core_cmd_set_property(struct si476x_core *, u16, u16);
 386 int si476x_core_cmd_get_property(struct si476x_core *, u16);
 387 int si476x_core_cmd_dig_audio_pin_cfg(struct si476x_core *,
 388                                       enum si476x_dclk_config,
 389                                       enum si476x_dfs_config,
 390                                       enum si476x_dout_config,
 391                                       enum si476x_xout_config);
 392 int si476x_core_cmd_zif_pin_cfg(struct si476x_core *,
 393                                 enum si476x_iqclk_config,
 394                                 enum si476x_iqfs_config,
 395                                 enum si476x_iout_config,
 396                                 enum si476x_qout_config);
 397 int si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(struct si476x_core *,
 398                                             enum si476x_icin_config,
 399                                             enum si476x_icip_config,
 400                                             enum si476x_icon_config,
 401                                             enum si476x_icop_config);
 402 int si476x_core_cmd_ana_audio_pin_cfg(struct si476x_core *,
 403                                       enum si476x_lrout_config);
 404 int si476x_core_cmd_intb_pin_cfg(struct si476x_core *, enum si476x_intb_config,
 405                                  enum si476x_a1_config);
 406 int si476x_core_cmd_fm_seek_start(struct si476x_core *, bool, bool);
 407 int si476x_core_cmd_am_seek_start(struct si476x_core *, bool, bool);
 408 int si476x_core_cmd_fm_rds_status(struct si476x_core *, bool, bool, bool,
 409                                   struct si476x_rds_status_report *);
 410 int si476x_core_cmd_fm_rds_blockcount(struct si476x_core *, bool,
 411                                       struct si476x_rds_blockcount_report *);
 412 int si476x_core_cmd_fm_tune_freq(struct si476x_core *,
 413                                  struct si476x_tune_freq_args *);
 414 int si476x_core_cmd_am_tune_freq(struct si476x_core *,
 415                                  struct si476x_tune_freq_args *);
 416 int si476x_core_cmd_am_rsq_status(struct si476x_core *,
 417                                   struct si476x_rsq_status_args *,
 418                                   struct si476x_rsq_status_report *);
 419 int si476x_core_cmd_fm_rsq_status(struct si476x_core *,
 420                                   struct si476x_rsq_status_args *,
 421                                   struct si476x_rsq_status_report *);
 422 int si476x_core_cmd_power_up(struct si476x_core *,
 423                              struct si476x_power_up_args *);
 424 int si476x_core_cmd_power_down(struct si476x_core *,
 425                                struct si476x_power_down_args *);
 426 int si476x_core_cmd_fm_phase_div_status(struct si476x_core *);
 427 int si476x_core_cmd_fm_phase_diversity(struct si476x_core *,
 428                                        enum si476x_phase_diversity_mode);
 429 
 430 int si476x_core_cmd_fm_acf_status(struct si476x_core *,
 431                                   struct si476x_acf_status_report *);
 432 int si476x_core_cmd_am_acf_status(struct si476x_core *,
 433                                   struct si476x_acf_status_report *);
 434 int si476x_core_cmd_agc_status(struct si476x_core *,
 435                                struct si476x_agc_status_report *);
 436 
 437 enum si476x_power_grid_type {
 438         SI476X_POWER_GRID_50HZ = 0,
 439         SI476X_POWER_GRID_60HZ,
 440 };
 441 
 442 /* Properties  */
 443 
 444 enum si476x_interrupt_flags {
 445         SI476X_STCIEN = (1 << 0),
 446         SI476X_ACFIEN = (1 << 1),
 447         SI476X_RDSIEN = (1 << 2),
 448         SI476X_RSQIEN = (1 << 3),
 449 
 450         SI476X_ERRIEN = (1 << 6),
 451         SI476X_CTSIEN = (1 << 7),
 452 
 453         SI476X_STCREP = (1 << 8),
 454         SI476X_ACFREP = (1 << 9),
 455         SI476X_RDSREP = (1 << 10),
 456         SI476X_RSQREP = (1 << 11),
 457 };
 458 
 459 enum si476x_rdsint_sources {
 460         SI476X_RDSTPPTY = (1 << 4),
 461         SI476X_RDSPI    = (1 << 3),
 462         SI476X_RDSSYNC  = (1 << 1),
 463         SI476X_RDSRECV  = (1 << 0),
 464 };
 465 
 466 enum si476x_status_response_bits {
 467         SI476X_CTS        = (1 << 7),
 468         SI476X_ERR        = (1 << 6),
 469         /* Status response for WB receiver */
 470         SI476X_WB_ASQ_INT = (1 << 4),
 471         SI476X_RSQ_INT    = (1 << 3),
 472         /* Status response for FM receiver */
 473         SI476X_FM_RDS_INT = (1 << 2),
 474         SI476X_ACF_INT    = (1 << 1),
 475         SI476X_STC_INT    = (1 << 0),
 476 };
 477 
 478 /* -------------------- si476x-prop.c ----------------------- */
 479 
 480 enum si476x_common_receiver_properties {
 481         SI476X_PROP_INT_CTL_ENABLE                      = 0x0000,
 482         SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE        = 0x0200,
 483         SI476X_PROP_DIGITAL_IO_INPUT_FORMAT             = 0x0201,
 484         SI476X_PROP_DIGITAL_IO_OUTPUT_SAMPLE_RATE       = 0x0202,
 485         SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT            = 0x0203,
 486 
 487         SI476X_PROP_SEEK_BAND_BOTTOM                    = 0x1100,
 488         SI476X_PROP_SEEK_BAND_TOP                       = 0x1101,
 489         SI476X_PROP_SEEK_FREQUENCY_SPACING              = 0x1102,
 490 
 491         SI476X_PROP_VALID_MAX_TUNE_ERROR                = 0x2000,
 492         SI476X_PROP_VALID_SNR_THRESHOLD                 = 0x2003,
 493         SI476X_PROP_VALID_RSSI_THRESHOLD                = 0x2004,
 494 };
 495 
 496 enum si476x_am_receiver_properties {
 497         SI476X_PROP_AUDIO_PWR_LINE_FILTER               = 0x0303,
 498 };
 499 
 500 enum si476x_fm_receiver_properties {
 501         SI476X_PROP_AUDIO_DEEMPHASIS                    = 0x0302,
 502 
 503         SI476X_PROP_FM_RDS_INTERRUPT_SOURCE             = 0x4000,
 504         SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT         = 0x4001,
 505         SI476X_PROP_FM_RDS_CONFIG                       = 0x4002,
 506 };
 507 
 508 enum si476x_prop_audio_pwr_line_filter_bits {
 509         SI476X_PROP_PWR_HARMONICS_MASK  = 0x001f,
 510         SI476X_PROP_PWR_GRID_MASK       = 0x0100,
 511         SI476X_PROP_PWR_ENABLE_MASK     = 0x0200,
 512         SI476X_PROP_PWR_GRID_50HZ       = 0x0000,
 513         SI476X_PROP_PWR_GRID_60HZ       = 0x0100,
 514 };
 515 
 516 enum si476x_prop_fm_rds_config_bits {
 517         SI476X_PROP_RDSEN_MASK  = 0x1,
 518         SI476X_PROP_RDSEN       = 0x1,
 519 };
 520 
 521 
 522 struct regmap *devm_regmap_init_si476x(struct si476x_core *);
 523 
 524 #endif  /* SI476X_CORE_H */