include/linux/mfd/si476x-core.h

   1 /*
   2  * include/media/si476x-core.h -- Common definitions for si476x core
   3  * device
   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  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; version 2 of the License.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  */
  20
  21 #ifndef SI476X_CORE_H
  22 #define SI476X_CORE_H
  23
  24 #include <linux/kfifo.h>
  25 #include <linux/atomic.h>
  26 #include <linux/i2c.h>
  27 #include <linux/regmap.h>
  28 #include <linux/mutex.h>
  29 #include <linux/mfd/core.h>
  30 #include <linux/videodev2.h>
  31 #include <linux/regulator/consumer.h>
  32
  33 #include <linux/mfd/si476x-platform.h>
  34 #include <linux/mfd/si476x-reports.h>
  35
  36 /* Command Timeouts */
  37 #define SI476X_DEFAULT_TIMEOUT  100000
  38 #define SI476X_TIMEOUT_TUNE     700000
  39 #define SI476X_TIMEOUT_POWER_UP 330000
  40 #define SI476X_STATUS_POLL_US   0
  41
  42 /* -------------------- si476x-i2c.c ----------------------- */
  43
  44 enum si476x_freq_supported_chips {
  45         SI476X_CHIP_SI4761 = 1,
  46         SI476X_CHIP_SI4764,
  47         SI476X_CHIP_SI4768,
  48 };
  49
  50 enum si476x_part_revisions {
  51         SI476X_REVISION_A10 = 0,
  52         SI476X_REVISION_A20 = 1,
  53         SI476X_REVISION_A30 = 2,
  54 };
  55
  56 enum si476x_mfd_cells {
  57         SI476X_RADIO_CELL = 0,
  58         SI476X_CODEC_CELL,
  59         SI476X_MFD_CELLS,
  60 };
  61
  62 /**
  63  * enum si476x_power_state - possible power state of the si476x
  64  * device.
  65  *
  66  * @SI476X_POWER_DOWN: In this state all regulators are turned off
  67  * and the reset line is pulled low. The device is completely
  68  * inactive.
  69  * @SI476X_POWER_UP_FULL: In this state all the power regualtors are
  70  * turned on, reset line pulled high, IRQ line is enabled(polling is
  71  * active for polling use scenario) and device is turned on with
  72  * POWER_UP command. The device is ready to be used.
  73  * @SI476X_POWER_INCONSISTENT: This state indicates that previous
  74  * power down was inconsistent, meaning some of the regulators were
  75  * not turned down and thus use of the device, without power-cycling
  76  * is impossible.
  77  */
  78 enum si476x_power_state {
  79         SI476X_POWER_DOWN               = 0,
  80         SI476X_POWER_UP_FULL            = 1,
  81         SI476X_POWER_INCONSISTENT       = 2,
  82 };
  83
  84 /**
  85  * struct si476x_core - internal data structure representing the
  86  * underlying "core" device which all the MFD cell-devices use.
  87  *
  88  * @client: Actual I2C client used to transfer commands to the chip.
  89  * @chip_id: Last digit of the chip model(E.g. "1" for SI4761)
  90  * @cells: MFD cell devices created by this driver.
  91  * @cmd_lock: Mutex used to serialize all the requests to the core
  92  * device. This filed should not be used directly. Instead
  93  * si476x_core_lock()/si476x_core_unlock() should be used to get
  94  * exclusive access to the "core" device.
  95  * @users: Active users counter(Used by the radio cell)
  96  * @rds_read_queue: Wait queue used to wait for RDS data.
  97  * @rds_fifo: FIFO in which all the RDS data received from the chip is
  98  * placed.
  99  * @rds_fifo_drainer: Worker that drains on-chip RDS FIFO.
 100  * @rds_drainer_is_working: Flag used for launching only one instance
 101  * of the @rds_fifo_drainer.
 102  * @rds_drainer_status_lock: Lock used to guard access to the
 103  * @rds_drainer_is_working variable.
 104  * @command: Wait queue for wainting on the command comapletion.
 105  * @cts: Clear To Send flag set upon receiving first status with CTS
 106  * set.
 107  * @tuning: Wait queue used for wainting for tune/seek comand
 108  * completion.
 109  * @stc: Similar to @cts, but for the STC bit of the status value.
 110  * @power_up_parameters: Parameters used as argument for POWER_UP
 111  * command when the device is started.
 112  * @state: Current power state of the device.
 113  * @supplues: Structure containing handles to all power supplies used
 114  * by the device (NULL ones are ignored).
 115  * @gpio_reset: GPIO pin connectet to the RSTB pin of the chip.
 116  * @pinmux: Chip's configurable pins configuration.
 117  * @diversity_mode: Chips role when functioning in diversity mode.
 118  * @status_monitor: Polling worker used in polling use case scenarion
 119  * (when IRQ is not avalible).
 120  * @revision: Chip's running firmware revision number(Used for correct
 121  * command set support).
 122  */
 123
 124 struct si476x_core {
 125         struct i2c_client *client;
 126         struct regmap *regmap;
 127         int chip_id;
 128         struct mfd_cell cells[SI476X_MFD_CELLS];
 129
 130         struct mutex cmd_lock; /* for serializing fm radio operations */
 131         atomic_t users;
 132
 133         wait_queue_head_t  rds_read_queue;
 134         struct kfifo       rds_fifo;
 135         struct work_struct rds_fifo_drainer;
 136         bool               rds_drainer_is_working;
 137         struct mutex       rds_drainer_status_lock;
 138
 139         wait_queue_head_t command;
 140         atomic_t          cts;
 141
 142         wait_queue_head_t tuning;
 143         atomic_t          stc;
 144
 145         struct si476x_power_up_args power_up_parameters;
 146
 147         enum si476x_power_state power_state;
 148
 149         struct regulator_bulk_data supplies[4];
 150
 151         int gpio_reset;
 152
 153         struct si476x_pinmux pinmux;
 154         enum si476x_phase_diversity_mode diversity_mode;
 155
 156         atomic_t is_alive;
 157
 158         struct delayed_work status_monitor;
 159 #define SI476X_WORK_TO_CORE(w) container_of(to_delayed_work(w), \
 160                                             struct si476x_core, \
 161                                             status_monitor)
 162
 163         int revision;
 164
 165         int rds_fifo_depth;
 166 };
 167
 168 static inline struct si476x_core *i2c_mfd_cell_to_core(struct device *dev)
 169 {
 170         struct i2c_client *client = to_i2c_client(dev->parent);
 171         return i2c_get_clientdata(client);
 172 }
 173
 174
 175 /**
 176  * si476x_core_lock() - lock the core device to get an exclusive access
 177  * to it.
 178  */
 179 static inline void si476x_core_lock(struct si476x_core *core)
 180 {
 181         mutex_lock(&core->cmd_lock);
 182 }
 183
 184 /**
 185  * si476x_core_unlock() - unlock the core device to relinquish an
 186  * exclusive access to it.
 187  */
 188 static inline void si476x_core_unlock(struct si476x_core *core)
 189 {
 190         mutex_unlock(&core->cmd_lock);
 191 }
 192
 193 /* *_TUNE_FREQ family of commands accept frequency in multiples of
 194     10kHz */
 195 static inline u16 hz_to_si476x(struct si476x_core *core, int freq)
 196 {
 197         u16 result;
 198
 199         switch (core->power_up_parameters.func) {
 200         default:
 201         case SI476X_FUNC_FM_RECEIVER:
 202                 result = freq / 10000;
 203                 break;
 204         case SI476X_FUNC_AM_RECEIVER:
 205                 result = freq / 1000;
 206                 break;
 207         }
 208
 209         return result;
 210 }
 211
 212 static inline int si476x_to_hz(struct si476x_core *core, u16 freq)
 213 {
 214         int result;
 215
 216         switch (core->power_up_parameters.func) {
 217         default:
 218         case SI476X_FUNC_FM_RECEIVER:
 219                 result = freq * 10000;
 220                 break;
 221         case SI476X_FUNC_AM_RECEIVER:
 222                 result = freq * 1000;
 223                 break;
 224         }
 225
 226         return result;
 227 }
 228
 229 /* Since the V4L2_TUNER_CAP_LOW flag is supplied, V4L2 subsystem
 230  * mesures frequency in 62.5 Hz units */
 231
 232 static inline int hz_to_v4l2(int freq)
 233 {
 234         return (freq * 10) / 625;
 235 }
 236
 237 static inline int v4l2_to_hz(int freq)
 238 {
 239         return (freq * 625) / 10;
 240 }
 241
 242 static inline u16 v4l2_to_si476x(struct si476x_core *core, int freq)
 243 {
 244         return hz_to_si476x(core, v4l2_to_hz(freq));
 245 }
 246
 247 static inline int si476x_to_v4l2(struct si476x_core *core, u16 freq)
 248 {
 249         return hz_to_v4l2(si476x_to_hz(core, freq));
 250 }
 251
 252
 253
 254 /**
 255  * struct si476x_func_info - structure containing result of the
 256  * FUNC_INFO command.
 257  *
 258  * @firmware.major: Firmware major number.
 259  * @firmware.minor[...]: Firmware minor numbers.
 260  * @patch_id:
 261  * @func: Mode tuner is working in.
 262  */
 263 struct si476x_func_info {
 264         struct {
 265                 u8 major, minor[2];
 266         } firmware;
 267         u16 patch_id;
 268         enum si476x_func func;
 269 };
 270
 271 /**
 272  * struct si476x_power_down_args - structure used to pass parameters
 273  * to POWER_DOWN command
 274  *
 275  * @xosc: true - Power down, but leav oscillator running.
 276  *        false - Full power down.
 277  */
 278 struct si476x_power_down_args {
 279         bool xosc;
 280 };
 281
 282 /**
 283  * enum si476x_tunemode - enum representing possible tune modes for
 284  * the chip.
 285  * @SI476X_TM_VALIDATED_NORMAL_TUNE: Unconditionally stay on the new
 286  * channel after tune, tune status is valid.
 287  * @SI476X_TM_INVALIDATED_FAST_TUNE: Unconditionally stay in the new
 288  * channel after tune, tune status invalid.
 289  * @SI476X_TM_VALIDATED_AF_TUNE: Jump back to previous channel if
 290  * metric thresholds are not met.
 291  * @SI476X_TM_VALIDATED_AF_CHECK: Unconditionally jump back to the
 292  * previous channel.
 293  */
 294 enum si476x_tunemode {
 295         SI476X_TM_VALIDATED_NORMAL_TUNE = 0,
 296         SI476X_TM_INVALIDATED_FAST_TUNE = 1,
 297         SI476X_TM_VALIDATED_AF_TUNE     = 2,
 298         SI476X_TM_VALIDATED_AF_CHECK    = 3,
 299 };
 300
 301 /**
 302  * enum si476x_smoothmetrics - enum containing the possible setting fo
 303  * audio transitioning of the chip
 304  * @SI476X_SM_INITIALIZE_AUDIO: Initialize audio state to match this
 305  * new channel
 306  * @SI476X_SM_TRANSITION_AUDIO: Transition audio state from previous
 307  * channel values to the new values
 308  */
 309 enum si476x_smoothmetrics {
 310         SI476X_SM_INITIALIZE_AUDIO = 0,
 311         SI476X_SM_TRANSITION_AUDIO = 1,
 312 };
 313
 314 /**
 315  * struct si476x_rds_status_report - the structure representing the
 316  * response to 'FM_RD_STATUS' command
 317  * @rdstpptyint: Traffic program flag(TP) and/or program type(PTY)
 318  * code has changed.
 319  * @rdspiint: Program identification(PI) code has changed.
 320  * @rdssyncint: RDS synchronization has changed.
 321  * @rdsfifoint: RDS was received and the RDS FIFO has at least
 322  * 'FM_RDS_INTERRUPT_FIFO_COUNT' elements in it.
 323  * @tpptyvalid: TP flag and PTY code are valid falg.
 324  * @pivalid: PI code is valid flag.
 325  * @rdssync: RDS is currently synchronized.
 326  * @rdsfifolost: On or more RDS groups have been lost/discarded flag.
 327  * @tp: Current channel's TP flag.
 328  * @pty: Current channel's PTY code.
 329  * @pi: Current channel's PI code.
 330  * @rdsfifoused: Number of blocks remaining in the RDS FIFO (0 if
 331  * empty).
 332  */
 333 struct si476x_rds_status_report {
 334         bool rdstpptyint, rdspiint, rdssyncint, rdsfifoint;
 335         bool tpptyvalid, pivalid, rdssync, rdsfifolost;
 336         bool tp;
 337
 338         u8 pty;
 339         u16 pi;
 340
 341         u8 rdsfifoused;
 342         u8 ble[4];
 343
 344         struct v4l2_rds_data rds[4];
 345 };
 346
 347 struct si476x_rsq_status_args {
 348         bool primary;
 349         bool rsqack;
 350         bool attune;
 351         bool cancel;
 352         bool stcack;
 353 };
 354
 355 enum si476x_injside {
 356         SI476X_INJSIDE_AUTO     = 0,
 357         SI476X_INJSIDE_LOW      = 1,
 358         SI476X_INJSIDE_HIGH     = 2,
 359 };
 360
 361 struct si476x_tune_freq_args {
 362         bool zifsr;
 363         bool hd;
 364         enum si476x_injside injside;
 365         int freq;
 366         enum si476x_tunemode tunemode;
 367         enum si476x_smoothmetrics smoothmetrics;
 368         int antcap;
 369 };
 370
 371 int  si476x_core_stop(struct si476x_core *, bool);
 372 int  si476x_core_start(struct si476x_core *, bool);
 373 int  si476x_core_set_power_state(struct si476x_core *, enum si476x_power_state);
 374 bool si476x_core_has_am(struct si476x_core *);
 375 bool si476x_core_has_diversity(struct si476x_core *);
 376 bool si476x_core_is_a_secondary_tuner(struct si476x_core *);
 377 bool si476x_core_is_a_primary_tuner(struct si476x_core *);
 378 bool si476x_core_is_in_am_receiver_mode(struct si476x_core *core);
 379 bool si476x_core_is_powered_up(struct si476x_core *core);
 380
 381 enum si476x_i2c_type {
 382         SI476X_I2C_SEND,
 383         SI476X_I2C_RECV
 384 };
 385
 386 int si476x_core_i2c_xfer(struct si476x_core *,
 387                          enum si476x_i2c_type,
 388                          char *, int);
 389
 390
 391 /* -------------------- si476x-cmd.c ----------------------- */
 392
 393 int si476x_core_cmd_func_info(struct si476x_core *, struct si476x_func_info *);
 394 int si476x_core_cmd_set_property(struct si476x_core *, u16, u16);
 395 int si476x_core_cmd_get_property(struct si476x_core *, u16);
 396 int si476x_core_cmd_dig_audio_pin_cfg(struct si476x_core *,
 397                                       enum si476x_dclk_config,
 398                                       enum si476x_dfs_config,
 399                                       enum si476x_dout_config,
 400                                       enum si476x_xout_config);
 401 int si476x_core_cmd_zif_pin_cfg(struct si476x_core *,
 402                                 enum si476x_iqclk_config,
 403                                 enum si476x_iqfs_config,
 404                                 enum si476x_iout_config,
 405                                 enum si476x_qout_config);
 406 int si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(struct si476x_core *,
 407                                             enum si476x_icin_config,
 408                                             enum si476x_icip_config,
 409                                             enum si476x_icon_config,
 410                                             enum si476x_icop_config);
 411 int si476x_core_cmd_ana_audio_pin_cfg(struct si476x_core *,
 412                                       enum si476x_lrout_config);
 413 int si476x_core_cmd_intb_pin_cfg(struct si476x_core *, enum si476x_intb_config,
 414                                  enum si476x_a1_config);
 415 int si476x_core_cmd_fm_seek_start(struct si476x_core *, bool, bool);
 416 int si476x_core_cmd_am_seek_start(struct si476x_core *, bool, bool);
 417 int si476x_core_cmd_fm_rds_status(struct si476x_core *, bool, bool, bool,
 418                                   struct si476x_rds_status_report *);
 419 int si476x_core_cmd_fm_rds_blockcount(struct si476x_core *, bool,
 420                                       struct si476x_rds_blockcount_report *);
 421 int si476x_core_cmd_fm_tune_freq(struct si476x_core *,
 422                                  struct si476x_tune_freq_args *);
 423 int si476x_core_cmd_am_tune_freq(struct si476x_core *,
 424                                  struct si476x_tune_freq_args *);
 425 int si476x_core_cmd_am_rsq_status(struct si476x_core *,
 426                                   struct si476x_rsq_status_args *,
 427                                   struct si476x_rsq_status_report *);
 428 int si476x_core_cmd_fm_rsq_status(struct si476x_core *,
 429                                   struct si476x_rsq_status_args *,
 430                                   struct si476x_rsq_status_report *);
 431 int si476x_core_cmd_power_up(struct si476x_core *,
 432                              struct si476x_power_up_args *);
 433 int si476x_core_cmd_power_down(struct si476x_core *,
 434                                struct si476x_power_down_args *);
 435 int si476x_core_cmd_fm_phase_div_status(struct si476x_core *);
 436 int si476x_core_cmd_fm_phase_diversity(struct si476x_core *,
 437                                        enum si476x_phase_diversity_mode);
 438
 439 int si476x_core_cmd_fm_acf_status(struct si476x_core *,
 440                                   struct si476x_acf_status_report *);
 441 int si476x_core_cmd_am_acf_status(struct si476x_core *,
 442                                   struct si476x_acf_status_report *);
 443 int si476x_core_cmd_agc_status(struct si476x_core *,
 444                                struct si476x_agc_status_report *);
 445
 446 enum si476x_power_grid_type {
 447         SI476X_POWER_GRID_50HZ = 0,
 448         SI476X_POWER_GRID_60HZ,
 449 };
 450
 451 /* Properties  */
 452
 453 enum si476x_interrupt_flags {
 454         SI476X_STCIEN = (1 << 0),
 455         SI476X_ACFIEN = (1 << 1),
 456         SI476X_RDSIEN = (1 << 2),
 457         SI476X_RSQIEN = (1 << 3),
 458
 459         SI476X_ERRIEN = (1 << 6),
 460         SI476X_CTSIEN = (1 << 7),
 461
 462         SI476X_STCREP = (1 << 8),
 463         SI476X_ACFREP = (1 << 9),
 464         SI476X_RDSREP = (1 << 10),
 465         SI476X_RSQREP = (1 << 11),
 466 };
 467
 468 enum si476x_rdsint_sources {
 469         SI476X_RDSTPPTY = (1 << 4),
 470         SI476X_RDSPI    = (1 << 3),
 471         SI476X_RDSSYNC  = (1 << 1),
 472         SI476X_RDSRECV  = (1 << 0),
 473 };
 474
 475 enum si476x_status_response_bits {
 476         SI476X_CTS        = (1 << 7),
 477         SI476X_ERR        = (1 << 6),
 478         /* Status response for WB receiver */
 479         SI476X_WB_ASQ_INT = (1 << 4),
 480         SI476X_RSQ_INT    = (1 << 3),
 481         /* Status response for FM receiver */
 482         SI476X_FM_RDS_INT = (1 << 2),
 483         SI476X_ACF_INT    = (1 << 1),
 484         SI476X_STC_INT    = (1 << 0),
 485 };
 486
 487 /* -------------------- si476x-prop.c ----------------------- */
 488
 489 enum si476x_common_receiver_properties {
 490         SI476X_PROP_INT_CTL_ENABLE                      = 0x0000,
 491         SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE        = 0x0200,
 492         SI476X_PROP_DIGITAL_IO_INPUT_FORMAT             = 0x0201,
 493         SI476X_PROP_DIGITAL_IO_OUTPUT_SAMPLE_RATE       = 0x0202,
 494         SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT            = 0x0203,
 495
 496         SI476X_PROP_SEEK_BAND_BOTTOM                    = 0x1100,
 497         SI476X_PROP_SEEK_BAND_TOP                       = 0x1101,
 498         SI476X_PROP_SEEK_FREQUENCY_SPACING              = 0x1102,
 499
 500         SI476X_PROP_VALID_MAX_TUNE_ERROR                = 0x2000,
 501         SI476X_PROP_VALID_SNR_THRESHOLD                 = 0x2003,
 502         SI476X_PROP_VALID_RSSI_THRESHOLD                = 0x2004,
 503 };
 504
 505 enum si476x_am_receiver_properties {
 506         SI476X_PROP_AUDIO_PWR_LINE_FILTER               = 0x0303,
 507 };
 508
 509 enum si476x_fm_receiver_properties {
 510         SI476X_PROP_AUDIO_DEEMPHASIS                    = 0x0302,
 511
 512         SI476X_PROP_FM_RDS_INTERRUPT_SOURCE             = 0x4000,
 513         SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT         = 0x4001,
 514         SI476X_PROP_FM_RDS_CONFIG                       = 0x4002,
 515 };
 516
 517 enum si476x_prop_audio_pwr_line_filter_bits {
 518         SI476X_PROP_PWR_HARMONICS_MASK  = 0x001f,
 519         SI476X_PROP_PWR_GRID_MASK       = 0x0100,
 520         SI476X_PROP_PWR_ENABLE_MASK     = 0x0200,
 521         SI476X_PROP_PWR_GRID_50HZ       = 0x0000,
 522         SI476X_PROP_PWR_GRID_60HZ       = 0x0100,
 523 };
 524
 525 enum si476x_prop_fm_rds_config_bits {
 526         SI476X_PROP_RDSEN_MASK  = 0x1,
 527         SI476X_PROP_RDSEN       = 0x1,
 528 };
 529
 530
 531 struct regmap *devm_regmap_init_si476x(struct si476x_core *);
 532
 533 #endif  /* SI476X_CORE_H */