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si476x-core.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * include/media/si476x-core.h -- Common definitions for si476x core * device * * Copyright (C) 2012 Innovative Converged Devices(ICD) * Copyright (C) 2013 Andrey Smirnov * * Author: Andrey Smirnov <andrew.smirnov@gmail.com> */ #ifndef SI476X_CORE_H #define SI476X_CORE_H #include <linux/kfifo.h> #include <linux/atomic.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/mutex.h> #include <linux/mfd/core.h> #include <linux/videodev2.h> #include <linux/regulator/consumer.h> #include <linux/mfd/si476x-platform.h> #include <linux/mfd/si476x-reports.h> /* Command Timeouts */ #define SI476X_DEFAULT_TIMEOUT 100000 #define SI476X_TIMEOUT_TUNE 700000 #define SI476X_TIMEOUT_POWER_UP 330000 #define SI476X_STATUS_POLL_US 0 /* -------------------- si476x-i2c.c ----------------------- */ enum si476x_freq_supported_chips { SI476X_CHIP_SI4761 = 1, SI476X_CHIP_SI4764, SI476X_CHIP_SI4768, }; enum si476x_part_revisions { SI476X_REVISION_A10 = 0, SI476X_REVISION_A20 = 1, SI476X_REVISION_A30 = 2, }; enum si476x_mfd_cells { SI476X_RADIO_CELL = 0, SI476X_CODEC_CELL, SI476X_MFD_CELLS, }; /** * enum si476x_power_state - possible power state of the si476x * device. * * @SI476X_POWER_DOWN: In this state all regulators are turned off * and the reset line is pulled low. The device is completely * inactive. * @SI476X_POWER_UP_FULL: In this state all the power regulators are * turned on, reset line pulled high, IRQ line is enabled(polling is * active for polling use scenario) and device is turned on with * POWER_UP command. The device is ready to be used. * @SI476X_POWER_INCONSISTENT: This state indicates that previous * power down was inconsistent, meaning some of the regulators were * not turned down and thus use of the device, without power-cycling * is impossible. */ enum si476x_power_state { SI476X_POWER_DOWN = 0, SI476X_POWER_UP_FULL = 1, SI476X_POWER_INCONSISTENT = 2, }; /** * struct si476x_core - internal data structure representing the * underlying "core" device which all the MFD cell-devices use. * * @client: Actual I2C client used to transfer commands to the chip. * @chip_id: Last digit of the chip model(E.g. "1" for SI4761) * @cells: MFD cell devices created by this driver. * @cmd_lock: Mutex used to serialize all the requests to the core * device. This filed should not be used directly. Instead * si476x_core_lock()/si476x_core_unlock() should be used to get * exclusive access to the "core" device. * @users: Active users counter(Used by the radio cell) * @rds_read_queue: Wait queue used to wait for RDS data. * @rds_fifo: FIFO in which all the RDS data received from the chip is * placed. * @rds_fifo_drainer: Worker that drains on-chip RDS FIFO. * @rds_drainer_is_working: Flag used for launching only one instance * of the @rds_fifo_drainer. * @rds_drainer_status_lock: Lock used to guard access to the * @rds_drainer_is_working variable. * @command: Wait queue for wainting on the command comapletion. * @cts: Clear To Send flag set upon receiving first status with CTS * set. * @tuning: Wait queue used for wainting for tune/seek comand * completion. * @stc: Similar to @cts, but for the STC bit of the status value. * @power_up_parameters: Parameters used as argument for POWER_UP * command when the device is started. * @state: Current power state of the device. * @supplues: Structure containing handles to all power supplies used * by the device (NULL ones are ignored). * @gpio_reset: GPIO pin connectet to the RSTB pin of the chip. * @pinmux: Chip's configurable pins configuration. * @diversity_mode: Chips role when functioning in diversity mode. * @status_monitor: Polling worker used in polling use case scenarion * (when IRQ is not avalible). * @revision: Chip's running firmware revision number(Used for correct * command set support). */ struct si476x_core { struct i2c_client *client; struct regmap *regmap; int chip_id; struct mfd_cell cells[SI476X_MFD_CELLS]; struct mutex cmd_lock; /* for serializing fm radio operations */ atomic_t users; wait_queue_head_t rds_read_queue; struct kfifo rds_fifo; struct work_struct rds_fifo_drainer; bool rds_drainer_is_working; struct mutex rds_drainer_status_lock; wait_queue_head_t command; atomic_t cts; wait_queue_head_t tuning; atomic_t stc; struct si476x_power_up_args power_up_parameters; enum si476x_power_state power_state; struct regulator_bulk_data supplies[4]; int gpio_reset; struct si476x_pinmux pinmux; enum si476x_phase_diversity_mode diversity_mode; atomic_t is_alive; struct delayed_work status_monitor; #define SI476X_WORK_TO_CORE(w) container_of(to_delayed_work(w), \ struct si476x_core, \ status_monitor) int revision; int rds_fifo_depth; }; static inline struct si476x_core *i2c_mfd_cell_to_core(struct device *dev) { struct i2c_client *client = to_i2c_client(dev->parent); return i2c_get_clientdata(client); } /** * si476x_core_lock() - lock the core device to get an exclusive access * to it. */ static inline void si476x_core_lock(struct si476x_core *core) { mutex_lock(&core->cmd_lock); } /** * si476x_core_unlock() - unlock the core device to relinquish an * exclusive access to it. */ static inline void si476x_core_unlock(struct si476x_core *core) { mutex_unlock(&core->cmd_lock); } /* *_TUNE_FREQ family of commands accept frequency in multiples of 10kHz */ static inline u16 hz_to_si476x(struct si476x_core *core, int freq) { u16 result; switch (core->power_up_parameters.func) { default: case SI476X_FUNC_FM_RECEIVER: result = freq / 10000; break; case SI476X_FUNC_AM_RECEIVER: result = freq / 1000; break; } return result; } static inline int si476x_to_hz(struct si476x_core *core, u16 freq) { int result; switch (core->power_up_parameters.func) { default: case SI476X_FUNC_FM_RECEIVER: result = freq * 10000; break; case SI476X_FUNC_AM_RECEIVER: result = freq * 1000; break; } return result; } /* Since the V4L2_TUNER_CAP_LOW flag is supplied, V4L2 subsystem * mesures frequency in 62.5 Hz units */ static inline int hz_to_v4l2(int freq) { return (freq * 10) / 625; } static inline int v4l2_to_hz(int freq) { return (freq * 625) / 10; } static inline u16 v4l2_to_si476x(struct si476x_core *core, int freq) { return hz_to_si476x(core, v4l2_to_hz(freq)); } static inline int si476x_to_v4l2(struct si476x_core *core, u16 freq) { return hz_to_v4l2(si476x_to_hz(core, freq)); } /** * struct si476x_func_info - structure containing result of the * FUNC_INFO command. * * @firmware.major: Firmware major number. * @firmware.minor[...]: Firmware minor numbers. * @patch_id: * @func: Mode tuner is working in. */ struct si476x_func_info { struct { u8 major, minor[2]; } firmware; u16 patch_id; enum si476x_func func; }; /** * struct si476x_power_down_args - structure used to pass parameters * to POWER_DOWN command * * @xosc: true - Power down, but leav oscillator running. * false - Full power down. */ struct si476x_power_down_args { bool xosc; }; /** * enum si476x_tunemode - enum representing possible tune modes for * the chip. * @SI476X_TM_VALIDATED_NORMAL_TUNE: Unconditionally stay on the new * channel after tune, tune status is valid. * @SI476X_TM_INVALIDATED_FAST_TUNE: Unconditionally stay in the new * channel after tune, tune status invalid. * @SI476X_TM_VALIDATED_AF_TUNE: Jump back to previous channel if * metric thresholds are not met. * @SI476X_TM_VALIDATED_AF_CHECK: Unconditionally jump back to the * previous channel. */ enum si476x_tunemode { SI476X_TM_VALIDATED_NORMAL_TUNE = 0, SI476X_TM_INVALIDATED_FAST_TUNE = 1, SI476X_TM_VALIDATED_AF_TUNE = 2, SI476X_TM_VALIDATED_AF_CHECK = 3, }; /** * enum si476x_smoothmetrics - enum containing the possible setting fo * audio transitioning of the chip * @SI476X_SM_INITIALIZE_AUDIO: Initialize audio state to match this * new channel * @SI476X_SM_TRANSITION_AUDIO: Transition audio state from previous * channel values to the new values */ enum si476x_smoothmetrics { SI476X_SM_INITIALIZE_AUDIO = 0, SI476X_SM_TRANSITION_AUDIO = 1, }; /** * struct si476x_rds_status_report - the structure representing the * response to 'FM_RD_STATUS' command * @rdstpptyint: Traffic program flag(TP) and/or program type(PTY) * code has changed. * @rdspiint: Program identification(PI) code has changed. * @rdssyncint: RDS synchronization has changed. * @rdsfifoint: RDS was received and the RDS FIFO has at least * 'FM_RDS_INTERRUPT_FIFO_COUNT' elements in it. * @tpptyvalid: TP flag and PTY code are valid falg. * @pivalid: PI code is valid flag. * @rdssync: RDS is currently synchronized. * @rdsfifolost: On or more RDS groups have been lost/discarded flag. * @tp: Current channel's TP flag. * @pty: Current channel's PTY code. * @pi: Current channel's PI code. * @rdsfifoused: Number of blocks remaining in the RDS FIFO (0 if * empty). */ struct si476x_rds_status_report { bool rdstpptyint, rdspiint, rdssyncint, rdsfifoint; bool tpptyvalid, pivalid, rdssync, rdsfifolost; bool tp; u8 pty; u16 pi; u8 rdsfifoused; u8 ble[4]; struct v4l2_rds_data rds[4]; }; struct si476x_rsq_status_args { bool primary; bool rsqack; bool attune; bool cancel; bool stcack; }; enum si476x_injside { SI476X_INJSIDE_AUTO = 0, SI476X_INJSIDE_LOW = 1, SI476X_INJSIDE_HIGH = 2, }; struct si476x_tune_freq_args { bool zifsr; bool hd; enum si476x_injside injside; int freq; enum si476x_tunemode tunemode; enum si476x_smoothmetrics smoothmetrics; int antcap; }; int si476x_core_stop(struct si476x_core *, bool); int si476x_core_start(struct si476x_core *, bool); int si476x_core_set_power_state(struct si476x_core *, enum si476x_power_state); bool si476x_core_has_am(struct si476x_core *); bool si476x_core_has_diversity(struct si476x_core *); bool si476x_core_is_a_secondary_tuner(struct si476x_core *); bool si476x_core_is_a_primary_tuner(struct si476x_core *); bool si476x_core_is_in_am_receiver_mode(struct si476x_core *core); bool si476x_core_is_powered_up(struct si476x_core *core); enum si476x_i2c_type { SI476X_I2C_SEND, SI476X_I2C_RECV }; int si476x_core_i2c_xfer(struct si476x_core *, enum si476x_i2c_type, char *, int); /* -------------------- si476x-cmd.c ----------------------- */ int si476x_core_cmd_func_info(struct si476x_core *, struct si476x_func_info *); int si476x_core_cmd_set_property(struct si476x_core *, u16, u16); int si476x_core_cmd_get_property(struct si476x_core *, u16); int si476x_core_cmd_dig_audio_pin_cfg(struct si476x_core *, enum si476x_dclk_config, enum si476x_dfs_config, enum si476x_dout_config, enum si476x_xout_config); int si476x_core_cmd_zif_pin_cfg(struct si476x_core *, enum si476x_iqclk_config, enum si476x_iqfs_config, enum si476x_iout_config, enum si476x_qout_config); int si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(struct si476x_core *, enum si476x_icin_config, enum si476x_icip_config, enum si476x_icon_config, enum si476x_icop_config); int si476x_core_cmd_ana_audio_pin_cfg(struct si476x_core *, enum si476x_lrout_config); int si476x_core_cmd_intb_pin_cfg(struct si476x_core *, enum si476x_intb_config, enum si476x_a1_config); int si476x_core_cmd_fm_seek_start(struct si476x_core *, bool, bool); int si476x_core_cmd_am_seek_start(struct si476x_core *, bool, bool); int si476x_core_cmd_fm_rds_status(struct si476x_core *, bool, bool, bool, struct si476x_rds_status_report *); int si476x_core_cmd_fm_rds_blockcount(struct si476x_core *, bool, struct si476x_rds_blockcount_report *); int si476x_core_cmd_fm_tune_freq(struct si476x_core *, struct si476x_tune_freq_args *); int si476x_core_cmd_am_tune_freq(struct si476x_core *, struct si476x_tune_freq_args *); int si476x_core_cmd_am_rsq_status(struct si476x_core *, struct si476x_rsq_status_args *, struct si476x_rsq_status_report *); int si476x_core_cmd_fm_rsq_status(struct si476x_core *, struct si476x_rsq_status_args *, struct si476x_rsq_status_report *); int si476x_core_cmd_power_up(struct si476x_core *, struct si476x_power_up_args *); int si476x_core_cmd_power_down(struct si476x_core *, struct si476x_power_down_args *); int si476x_core_cmd_fm_phase_div_status(struct si476x_core *); int si476x_core_cmd_fm_phase_diversity(struct si476x_core *, enum si476x_phase_diversity_mode); int si476x_core_cmd_fm_acf_status(struct si476x_core *, struct si476x_acf_status_report *); int si476x_core_cmd_am_acf_status(struct si476x_core *, struct si476x_acf_status_report *); int si476x_core_cmd_agc_status(struct si476x_core *, struct si476x_agc_status_report *); enum si476x_power_grid_type { SI476X_POWER_GRID_50HZ = 0, SI476X_POWER_GRID_60HZ, }; /* Properties */ enum si476x_interrupt_flags { SI476X_STCIEN = (1 << 0), SI476X_ACFIEN = (1 << 1), SI476X_RDSIEN = (1 << 2), SI476X_RSQIEN = (1 << 3), SI476X_ERRIEN = (1 << 6), SI476X_CTSIEN = (1 << 7), SI476X_STCREP = (1 << 8), SI476X_ACFREP = (1 << 9), SI476X_RDSREP = (1 << 10), SI476X_RSQREP = (1 << 11), }; enum si476x_rdsint_sources { SI476X_RDSTPPTY = (1 << 4), SI476X_RDSPI = (1 << 3), SI476X_RDSSYNC = (1 << 1), SI476X_RDSRECV = (1 << 0), }; enum si476x_status_response_bits { SI476X_CTS = (1 << 7), SI476X_ERR = (1 << 6), /* Status response for WB receiver */ SI476X_WB_ASQ_INT = (1 << 4), SI476X_RSQ_INT = (1 << 3), /* Status response for FM receiver */ SI476X_FM_RDS_INT = (1 << 2), SI476X_ACF_INT = (1 << 1), SI476X_STC_INT = (1 << 0), }; /* -------------------- si476x-prop.c ----------------------- */ enum si476x_common_receiver_properties { SI476X_PROP_INT_CTL_ENABLE = 0x0000, SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE = 0x0200, SI476X_PROP_DIGITAL_IO_INPUT_FORMAT = 0x0201, SI476X_PROP_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202, SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT = 0x0203, SI476X_PROP_SEEK_BAND_BOTTOM = 0x1100, SI476X_PROP_SEEK_BAND_TOP = 0x1101, SI476X_PROP_SEEK_FREQUENCY_SPACING = 0x1102, SI476X_PROP_VALID_MAX_TUNE_ERROR = 0x2000, SI476X_PROP_VALID_SNR_THRESHOLD = 0x2003, SI476X_PROP_VALID_RSSI_THRESHOLD = 0x2004, }; enum si476x_am_receiver_properties { SI476X_PROP_AUDIO_PWR_LINE_FILTER = 0x0303, }; enum si476x_fm_receiver_properties { SI476X_PROP_AUDIO_DEEMPHASIS = 0x0302, SI476X_PROP_FM_RDS_INTERRUPT_SOURCE = 0x4000, SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT = 0x4001, SI476X_PROP_FM_RDS_CONFIG = 0x4002, }; enum si476x_prop_audio_pwr_line_filter_bits { SI476X_PROP_PWR_HARMONICS_MASK = 0x001f, SI476X_PROP_PWR_GRID_MASK = 0x0100, SI476X_PROP_PWR_ENABLE_MASK = 0x0200, SI476X_PROP_PWR_GRID_50HZ = 0x0000, SI476X_PROP_PWR_GRID_60HZ = 0x0100, }; enum si476x_prop_fm_rds_config_bits { SI476X_PROP_RDSEN_MASK = 0x1, SI476X_PROP_RDSEN = 0x1, }; struct regmap *devm_regmap_init_si476x(struct si476x_core *); #endif /* SI476X_CORE_H */
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