Current File : //usr/src/linux-headers-5.15.0-125-generic/include/linux/counter.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Counter interface
* Copyright (C) 2018 William Breathitt Gray
*/
#ifndef _COUNTER_H_
#define _COUNTER_H_
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/types.h>
struct counter_device;
struct counter_count;
struct counter_synapse;
struct counter_signal;
enum counter_comp_type {
COUNTER_COMP_U8,
COUNTER_COMP_U64,
COUNTER_COMP_BOOL,
COUNTER_COMP_SIGNAL_LEVEL,
COUNTER_COMP_FUNCTION,
COUNTER_COMP_SYNAPSE_ACTION,
COUNTER_COMP_ENUM,
COUNTER_COMP_COUNT_DIRECTION,
COUNTER_COMP_COUNT_MODE,
};
enum counter_scope {
COUNTER_SCOPE_DEVICE,
COUNTER_SCOPE_SIGNAL,
COUNTER_SCOPE_COUNT,
};
enum counter_count_direction {
COUNTER_COUNT_DIRECTION_FORWARD,
COUNTER_COUNT_DIRECTION_BACKWARD,
};
enum counter_count_mode {
COUNTER_COUNT_MODE_NORMAL,
COUNTER_COUNT_MODE_RANGE_LIMIT,
COUNTER_COUNT_MODE_NON_RECYCLE,
COUNTER_COUNT_MODE_MODULO_N,
};
enum counter_function {
COUNTER_FUNCTION_INCREASE,
COUNTER_FUNCTION_DECREASE,
COUNTER_FUNCTION_PULSE_DIRECTION,
COUNTER_FUNCTION_QUADRATURE_X1_A,
COUNTER_FUNCTION_QUADRATURE_X1_B,
COUNTER_FUNCTION_QUADRATURE_X2_A,
COUNTER_FUNCTION_QUADRATURE_X2_B,
COUNTER_FUNCTION_QUADRATURE_X4,
};
enum counter_signal_level {
COUNTER_SIGNAL_LEVEL_LOW,
COUNTER_SIGNAL_LEVEL_HIGH,
};
enum counter_synapse_action {
COUNTER_SYNAPSE_ACTION_NONE,
COUNTER_SYNAPSE_ACTION_RISING_EDGE,
COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
/**
* struct counter_comp - Counter component node
* @type: Counter component data type
* @name: device-specific component name
* @priv: component-relevant data
* @action_read: Synapse action mode read callback. The read value of the
* respective Synapse action mode should be passed back via
* the action parameter.
* @device_u8_read: Device u8 component read callback. The read value of the
* respective Device u8 component should be passed back via
* the val parameter.
* @count_u8_read: Count u8 component read callback. The read value of the
* respective Count u8 component should be passed back via
* the val parameter.
* @signal_u8_read: Signal u8 component read callback. The read value of the
* respective Signal u8 component should be passed back via
* the val parameter.
* @device_u32_read: Device u32 component read callback. The read value of
* the respective Device u32 component should be passed
* back via the val parameter.
* @count_u32_read: Count u32 component read callback. The read value of the
* respective Count u32 component should be passed back via
* the val parameter.
* @signal_u32_read: Signal u32 component read callback. The read value of
* the respective Signal u32 component should be passed
* back via the val parameter.
* @device_u64_read: Device u64 component read callback. The read value of
* the respective Device u64 component should be passed
* back via the val parameter.
* @count_u64_read: Count u64 component read callback. The read value of the
* respective Count u64 component should be passed back via
* the val parameter.
* @signal_u64_read: Signal u64 component read callback. The read value of
* the respective Signal u64 component should be passed
* back via the val parameter.
* @action_write: Synapse action mode write callback. The write value of
* the respective Synapse action mode is passed via the
* action parameter.
* @device_u8_write: Device u8 component write callback. The write value of
* the respective Device u8 component is passed via the val
* parameter.
* @count_u8_write: Count u8 component write callback. The write value of
* the respective Count u8 component is passed via the val
* parameter.
* @signal_u8_write: Signal u8 component write callback. The write value of
* the respective Signal u8 component is passed via the val
* parameter.
* @device_u32_write: Device u32 component write callback. The write value of
* the respective Device u32 component is passed via the
* val parameter.
* @count_u32_write: Count u32 component write callback. The write value of
* the respective Count u32 component is passed via the val
* parameter.
* @signal_u32_write: Signal u32 component write callback. The write value of
* the respective Signal u32 component is passed via the
* val parameter.
* @device_u64_write: Device u64 component write callback. The write value of
* the respective Device u64 component is passed via the
* val parameter.
* @count_u64_write: Count u64 component write callback. The write value of
* the respective Count u64 component is passed via the val
* parameter.
* @signal_u64_write: Signal u64 component write callback. The write value of
* the respective Signal u64 component is passed via the
* val parameter.
*/
struct counter_comp {
enum counter_comp_type type;
const char *name;
void *priv;
union {
int (*action_read)(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
enum counter_synapse_action *action);
int (*device_u8_read)(struct counter_device *counter, u8 *val);
int (*count_u8_read)(struct counter_device *counter,
struct counter_count *count, u8 *val);
int (*signal_u8_read)(struct counter_device *counter,
struct counter_signal *signal, u8 *val);
int (*device_u32_read)(struct counter_device *counter,
u32 *val);
int (*count_u32_read)(struct counter_device *counter,
struct counter_count *count, u32 *val);
int (*signal_u32_read)(struct counter_device *counter,
struct counter_signal *signal, u32 *val);
int (*device_u64_read)(struct counter_device *counter,
u64 *val);
int (*count_u64_read)(struct counter_device *counter,
struct counter_count *count, u64 *val);
int (*signal_u64_read)(struct counter_device *counter,
struct counter_signal *signal, u64 *val);
};
union {
int (*action_write)(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
enum counter_synapse_action action);
int (*device_u8_write)(struct counter_device *counter, u8 val);
int (*count_u8_write)(struct counter_device *counter,
struct counter_count *count, u8 val);
int (*signal_u8_write)(struct counter_device *counter,
struct counter_signal *signal, u8 val);
int (*device_u32_write)(struct counter_device *counter,
u32 val);
int (*count_u32_write)(struct counter_device *counter,
struct counter_count *count, u32 val);
int (*signal_u32_write)(struct counter_device *counter,
struct counter_signal *signal, u32 val);
int (*device_u64_write)(struct counter_device *counter,
u64 val);
int (*count_u64_write)(struct counter_device *counter,
struct counter_count *count, u64 val);
int (*signal_u64_write)(struct counter_device *counter,
struct counter_signal *signal, u64 val);
};
};
/**
* struct counter_signal - Counter Signal node
* @id: unique ID used to identify signal
* @name: device-specific Signal name; ideally, this should match the name
* as it appears in the datasheet documentation
* @ext: optional array of Counter Signal extensions
* @num_ext: number of Counter Signal extensions specified in @ext
*/
struct counter_signal {
int id;
const char *name;
struct counter_comp *ext;
size_t num_ext;
};
/**
* struct counter_synapse - Counter Synapse node
* @actions_list: array of available action modes
* @num_actions: number of action modes specified in @actions_list
* @signal: pointer to associated signal
*/
struct counter_synapse {
const enum counter_synapse_action *actions_list;
size_t num_actions;
struct counter_signal *signal;
};
/**
* struct counter_count - Counter Count node
* @id: unique ID used to identify Count
* @name: device-specific Count name; ideally, this should match
* the name as it appears in the datasheet documentation
* @functions_list: array available function modes
* @num_functions: number of function modes specified in @functions_list
* @synapses: array of synapses for initialization
* @num_synapses: number of synapses specified in @synapses
* @ext: optional array of Counter Count extensions
* @num_ext: number of Counter Count extensions specified in @ext
*/
struct counter_count {
int id;
const char *name;
const enum counter_function *functions_list;
size_t num_functions;
struct counter_synapse *synapses;
size_t num_synapses;
struct counter_comp *ext;
size_t num_ext;
};
/**
* struct counter_ops - Callbacks from driver
* @signal_read: optional read callback for Signal attribute. The read
* level of the respective Signal should be passed back via
* the level parameter.
* @count_read: optional read callback for Count attribute. The read
* value of the respective Count should be passed back via
* the val parameter.
* @count_write: optional write callback for Count attribute. The write
* value for the respective Count is passed in via the val
* parameter.
* @function_read: read callback the Count function modes. The read
* function mode of the respective Count should be passed
* back via the function parameter.
* @function_write: write callback for Count function modes. The function
* mode to write for the respective Count is passed in via
* the function parameter.
* @action_read: read callback the Synapse action modes. The read action
* mode of the respective Synapse should be passed back via
* the action parameter.
* @action_write: write callback for Synapse action modes. The action mode
* to write for the respective Synapse is passed in via the
* action parameter.
*/
struct counter_ops {
int (*signal_read)(struct counter_device *counter,
struct counter_signal *signal,
enum counter_signal_level *level);
int (*count_read)(struct counter_device *counter,
struct counter_count *count, u64 *value);
int (*count_write)(struct counter_device *counter,
struct counter_count *count, u64 value);
int (*function_read)(struct counter_device *counter,
struct counter_count *count,
enum counter_function *function);
int (*function_write)(struct counter_device *counter,
struct counter_count *count,
enum counter_function function);
int (*action_read)(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
enum counter_synapse_action *action);
int (*action_write)(struct counter_device *counter,
struct counter_count *count,
struct counter_synapse *synapse,
enum counter_synapse_action action);
};
/**
* struct counter_device - Counter data structure
* @name: name of the device as it appears in the datasheet
* @parent: optional parent device providing the counters
* @ops: callbacks from driver
* @signals: array of Signals
* @num_signals: number of Signals specified in @signals
* @counts: array of Counts
* @num_counts: number of Counts specified in @counts
* @ext: optional array of Counter device extensions
* @num_ext: number of Counter device extensions specified in @ext
* @priv: optional private data supplied by driver
* @dev: internal device structure
*/
struct counter_device {
const char *name;
struct device *parent;
const struct counter_ops *ops;
struct counter_signal *signals;
size_t num_signals;
struct counter_count *counts;
size_t num_counts;
struct counter_comp *ext;
size_t num_ext;
void *priv;
struct device dev;
};
int counter_register(struct counter_device *const counter);
void counter_unregister(struct counter_device *const counter);
int devm_counter_register(struct device *dev,
struct counter_device *const counter);
#define COUNTER_COMP_DEVICE_U8(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U8, \
.name = (_name), \
.device_u8_read = (_read), \
.device_u8_write = (_write), \
}
#define COUNTER_COMP_COUNT_U8(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U8, \
.name = (_name), \
.count_u8_read = (_read), \
.count_u8_write = (_write), \
}
#define COUNTER_COMP_SIGNAL_U8(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U8, \
.name = (_name), \
.signal_u8_read = (_read), \
.signal_u8_write = (_write), \
}
#define COUNTER_COMP_DEVICE_U64(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U64, \
.name = (_name), \
.device_u64_read = (_read), \
.device_u64_write = (_write), \
}
#define COUNTER_COMP_COUNT_U64(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U64, \
.name = (_name), \
.count_u64_read = (_read), \
.count_u64_write = (_write), \
}
#define COUNTER_COMP_SIGNAL_U64(_name, _read, _write) \
{ \
.type = COUNTER_COMP_U64, \
.name = (_name), \
.signal_u64_read = (_read), \
.signal_u64_write = (_write), \
}
#define COUNTER_COMP_DEVICE_BOOL(_name, _read, _write) \
{ \
.type = COUNTER_COMP_BOOL, \
.name = (_name), \
.device_u8_read = (_read), \
.device_u8_write = (_write), \
}
#define COUNTER_COMP_COUNT_BOOL(_name, _read, _write) \
{ \
.type = COUNTER_COMP_BOOL, \
.name = (_name), \
.count_u8_read = (_read), \
.count_u8_write = (_write), \
}
#define COUNTER_COMP_SIGNAL_BOOL(_name, _read, _write) \
{ \
.type = COUNTER_COMP_BOOL, \
.name = (_name), \
.signal_u8_read = (_read), \
.signal_u8_write = (_write), \
}
struct counter_available {
union {
const u32 *enums;
const char *const *strs;
};
size_t num_items;
};
#define DEFINE_COUNTER_AVAILABLE(_name, _enums) \
struct counter_available _name = { \
.enums = (_enums), \
.num_items = ARRAY_SIZE(_enums), \
}
#define DEFINE_COUNTER_ENUM(_name, _strs) \
struct counter_available _name = { \
.strs = (_strs), \
.num_items = ARRAY_SIZE(_strs), \
}
#define COUNTER_COMP_DEVICE_ENUM(_name, _get, _set, _available) \
{ \
.type = COUNTER_COMP_ENUM, \
.name = (_name), \
.device_u32_read = (_get), \
.device_u32_write = (_set), \
.priv = &(_available), \
}
#define COUNTER_COMP_COUNT_ENUM(_name, _get, _set, _available) \
{ \
.type = COUNTER_COMP_ENUM, \
.name = (_name), \
.count_u32_read = (_get), \
.count_u32_write = (_set), \
.priv = &(_available), \
}
#define COUNTER_COMP_SIGNAL_ENUM(_name, _get, _set, _available) \
{ \
.type = COUNTER_COMP_ENUM, \
.name = (_name), \
.signal_u32_read = (_get), \
.signal_u32_write = (_set), \
.priv = &(_available), \
}
#define COUNTER_COMP_CEILING(_read, _write) \
COUNTER_COMP_COUNT_U64("ceiling", _read, _write)
#define COUNTER_COMP_COUNT_MODE(_read, _write, _available) \
{ \
.type = COUNTER_COMP_COUNT_MODE, \
.name = "count_mode", \
.count_u32_read = (_read), \
.count_u32_write = (_write), \
.priv = &(_available), \
}
#define COUNTER_COMP_DIRECTION(_read) \
{ \
.type = COUNTER_COMP_COUNT_DIRECTION, \
.name = "direction", \
.count_u32_read = (_read), \
}
#define COUNTER_COMP_ENABLE(_read, _write) \
COUNTER_COMP_COUNT_BOOL("enable", _read, _write)
#define COUNTER_COMP_FLOOR(_read, _write) \
COUNTER_COMP_COUNT_U64("floor", _read, _write)
#define COUNTER_COMP_PRESET(_read, _write) \
COUNTER_COMP_COUNT_U64("preset", _read, _write)
#define COUNTER_COMP_PRESET_ENABLE(_read, _write) \
COUNTER_COMP_COUNT_BOOL("preset_enable", _read, _write)
#endif /* _COUNTER_H_ */
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