/** * 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).
*/
/** * si476x_core_lock() - lock the core device to get an exclusive access * to it.
*/ staticinlinevoid 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.
*/ staticinlinevoid si476x_core_unlock(struct si476x_core *core)
{
mutex_unlock(&core->cmd_lock);
}
/* *_TUNE_FREQ family of commands accept frequency in multiples of
10kHz */ staticinline 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;
}
staticinlineint 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 */
/** * 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;
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