- 根目录:
- include
- linux
- mfd
- si476x-core.h
/*
* 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>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#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 regualtors 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 */