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 regulators 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 i2c_mfd_cell_to_core(struct device * dev)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 */ si476x_core_lock(struct si476x_core * core)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 */ si476x_core_unlock(struct si476x_core * core)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 */ hz_to_si476x(struct si476x_core * core,int freq)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 si476x_to_hz(struct si476x_core * core,u16 freq)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 hz_to_v4l2(int freq)223 static inline int hz_to_v4l2(int freq) 224 { 225 return (freq * 10) / 625; 226 } 227 v4l2_to_hz(int freq)228 static inline int v4l2_to_hz(int freq) 229 { 230 return (freq * 625) / 10; 231 } 232 v4l2_to_si476x(struct si476x_core * core,int freq)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 si476x_to_v4l2(struct si476x_core * core,u16 freq)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 */ 525