633 lines
21 KiB
C
633 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Counter interface
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* Copyright (C) 2018 William Breathitt Gray
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*/
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#ifndef _COUNTER_H_
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#define _COUNTER_H_
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#include <linux/cdev.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/kfifo.h>
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#include <linux/mutex.h>
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#include <linux/spinlock_types.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#include <uapi/linux/counter.h>
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struct counter_device;
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struct counter_count;
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struct counter_synapse;
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struct counter_signal;
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enum counter_comp_type {
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COUNTER_COMP_U8,
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COUNTER_COMP_U64,
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COUNTER_COMP_BOOL,
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COUNTER_COMP_SIGNAL_LEVEL,
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COUNTER_COMP_FUNCTION,
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COUNTER_COMP_SYNAPSE_ACTION,
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COUNTER_COMP_ENUM,
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COUNTER_COMP_COUNT_DIRECTION,
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COUNTER_COMP_COUNT_MODE,
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COUNTER_COMP_SIGNAL_POLARITY,
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COUNTER_COMP_ARRAY,
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};
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/**
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* struct counter_comp - Counter component node
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* @type: Counter component data type
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* @name: device-specific component name
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* @priv: component-relevant data
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* @action_read: Synapse action mode read callback. The read value of the
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* respective Synapse action mode should be passed back via
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* the action parameter.
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* @device_u8_read: Device u8 component read callback. The read value of the
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* respective Device u8 component should be passed back via
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* the val parameter.
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* @count_u8_read: Count u8 component read callback. The read value of the
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* respective Count u8 component should be passed back via
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* the val parameter.
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* @signal_u8_read: Signal u8 component read callback. The read value of the
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* respective Signal u8 component should be passed back via
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* the val parameter.
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* @device_u32_read: Device u32 component read callback. The read value of
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* the respective Device u32 component should be passed
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* back via the val parameter.
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* @count_u32_read: Count u32 component read callback. The read value of the
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* respective Count u32 component should be passed back via
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* the val parameter.
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* @signal_u32_read: Signal u32 component read callback. The read value of
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* the respective Signal u32 component should be passed
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* back via the val parameter.
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* @device_u64_read: Device u64 component read callback. The read value of
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* the respective Device u64 component should be passed
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* back via the val parameter.
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* @count_u64_read: Count u64 component read callback. The read value of the
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* respective Count u64 component should be passed back via
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* the val parameter.
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* @signal_u64_read: Signal u64 component read callback. The read value of
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* the respective Signal u64 component should be passed
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* back via the val parameter.
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* @signal_array_u32_read: Signal u32 array component read callback. The
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* index of the respective Count u32 array
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* component element is passed via the idx
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* parameter. The read value of the respective
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* Count u32 array component element should be
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* passed back via the val parameter.
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* @device_array_u64_read: Device u64 array component read callback. The
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* index of the respective Device u64 array
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* component element is passed via the idx
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* parameter. The read value of the respective
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* Device u64 array component element should be
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* passed back via the val parameter.
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* @count_array_u64_read: Count u64 array component read callback. The
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* index of the respective Count u64 array
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* component element is passed via the idx
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* parameter. The read value of the respective
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* Count u64 array component element should be
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* passed back via the val parameter.
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* @signal_array_u64_read: Signal u64 array component read callback. The
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* index of the respective Count u64 array
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* component element is passed via the idx
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* parameter. The read value of the respective
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* Count u64 array component element should be
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* passed back via the val parameter.
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* @action_write: Synapse action mode write callback. The write value of
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* the respective Synapse action mode is passed via the
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* action parameter.
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* @device_u8_write: Device u8 component write callback. The write value of
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* the respective Device u8 component is passed via the val
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* parameter.
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* @count_u8_write: Count u8 component write callback. The write value of
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* the respective Count u8 component is passed via the val
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* parameter.
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* @signal_u8_write: Signal u8 component write callback. The write value of
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* the respective Signal u8 component is passed via the val
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* parameter.
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* @device_u32_write: Device u32 component write callback. The write value of
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* the respective Device u32 component is passed via the
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* val parameter.
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* @count_u32_write: Count u32 component write callback. The write value of
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* the respective Count u32 component is passed via the val
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* parameter.
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* @signal_u32_write: Signal u32 component write callback. The write value of
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* the respective Signal u32 component is passed via the
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* val parameter.
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* @device_u64_write: Device u64 component write callback. The write value of
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* the respective Device u64 component is passed via the
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* val parameter.
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* @count_u64_write: Count u64 component write callback. The write value of
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* the respective Count u64 component is passed via the val
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* parameter.
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* @signal_u64_write: Signal u64 component write callback. The write value of
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* the respective Signal u64 component is passed via the
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* val parameter.
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* @signal_array_u32_write: Signal u32 array component write callback. The
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* index of the respective Signal u32 array
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* component element is passed via the idx
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* parameter. The write value of the respective
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* Signal u32 array component element is passed via
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* the val parameter.
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* @device_array_u64_write: Device u64 array component write callback. The
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* index of the respective Device u64 array
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* component element is passed via the idx
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* parameter. The write value of the respective
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* Device u64 array component element is passed via
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* the val parameter.
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* @count_array_u64_write: Count u64 array component write callback. The
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* index of the respective Count u64 array
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* component element is passed via the idx
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* parameter. The write value of the respective
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* Count u64 array component element is passed via
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* the val parameter.
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* @signal_array_u64_write: Signal u64 array component write callback. The
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* index of the respective Signal u64 array
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* component element is passed via the idx
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* parameter. The write value of the respective
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* Signal u64 array component element is passed via
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* the val parameter.
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*/
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struct counter_comp {
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enum counter_comp_type type;
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const char *name;
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void *priv;
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union {
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int (*action_read)(struct counter_device *counter,
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struct counter_count *count,
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struct counter_synapse *synapse,
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enum counter_synapse_action *action);
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int (*device_u8_read)(struct counter_device *counter, u8 *val);
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int (*count_u8_read)(struct counter_device *counter,
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struct counter_count *count, u8 *val);
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int (*signal_u8_read)(struct counter_device *counter,
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struct counter_signal *signal, u8 *val);
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int (*device_u32_read)(struct counter_device *counter,
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u32 *val);
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int (*count_u32_read)(struct counter_device *counter,
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struct counter_count *count, u32 *val);
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int (*signal_u32_read)(struct counter_device *counter,
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struct counter_signal *signal, u32 *val);
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int (*device_u64_read)(struct counter_device *counter,
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u64 *val);
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int (*count_u64_read)(struct counter_device *counter,
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struct counter_count *count, u64 *val);
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int (*signal_u64_read)(struct counter_device *counter,
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struct counter_signal *signal, u64 *val);
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int (*signal_array_u32_read)(struct counter_device *counter,
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struct counter_signal *signal,
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size_t idx, u32 *val);
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int (*device_array_u64_read)(struct counter_device *counter,
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size_t idx, u64 *val);
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int (*count_array_u64_read)(struct counter_device *counter,
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struct counter_count *count,
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size_t idx, u64 *val);
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int (*signal_array_u64_read)(struct counter_device *counter,
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struct counter_signal *signal,
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size_t idx, u64 *val);
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};
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union {
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int (*action_write)(struct counter_device *counter,
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struct counter_count *count,
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struct counter_synapse *synapse,
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enum counter_synapse_action action);
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int (*device_u8_write)(struct counter_device *counter, u8 val);
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int (*count_u8_write)(struct counter_device *counter,
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struct counter_count *count, u8 val);
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int (*signal_u8_write)(struct counter_device *counter,
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struct counter_signal *signal, u8 val);
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int (*device_u32_write)(struct counter_device *counter,
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u32 val);
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int (*count_u32_write)(struct counter_device *counter,
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struct counter_count *count, u32 val);
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int (*signal_u32_write)(struct counter_device *counter,
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struct counter_signal *signal, u32 val);
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int (*device_u64_write)(struct counter_device *counter,
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u64 val);
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int (*count_u64_write)(struct counter_device *counter,
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struct counter_count *count, u64 val);
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int (*signal_u64_write)(struct counter_device *counter,
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struct counter_signal *signal, u64 val);
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int (*signal_array_u32_write)(struct counter_device *counter,
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struct counter_signal *signal,
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size_t idx, u32 val);
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int (*device_array_u64_write)(struct counter_device *counter,
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size_t idx, u64 val);
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int (*count_array_u64_write)(struct counter_device *counter,
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struct counter_count *count,
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size_t idx, u64 val);
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int (*signal_array_u64_write)(struct counter_device *counter,
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struct counter_signal *signal,
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size_t idx, u64 val);
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};
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};
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/**
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* struct counter_signal - Counter Signal node
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* @id: unique ID used to identify the Signal
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* @name: device-specific Signal name
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* @ext: optional array of Signal extensions
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* @num_ext: number of Signal extensions specified in @ext
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*/
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struct counter_signal {
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int id;
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const char *name;
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struct counter_comp *ext;
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size_t num_ext;
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};
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/**
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* struct counter_synapse - Counter Synapse node
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* @actions_list: array of available action modes
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* @num_actions: number of action modes specified in @actions_list
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* @signal: pointer to the associated Signal
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*/
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struct counter_synapse {
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const enum counter_synapse_action *actions_list;
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size_t num_actions;
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struct counter_signal *signal;
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};
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/**
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* struct counter_count - Counter Count node
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* @id: unique ID used to identify the Count
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* @name: device-specific Count name
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* @functions_list: array of available function modes
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* @num_functions: number of function modes specified in @functions_list
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* @synapses: array of Synapses for initialization
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* @num_synapses: number of Synapses specified in @synapses
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* @ext: optional array of Count extensions
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* @num_ext: number of Count extensions specified in @ext
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*/
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struct counter_count {
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int id;
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const char *name;
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const enum counter_function *functions_list;
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size_t num_functions;
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struct counter_synapse *synapses;
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size_t num_synapses;
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struct counter_comp *ext;
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size_t num_ext;
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};
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/**
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* struct counter_event_node - Counter Event node
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* @l: list of current watching Counter events
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* @event: event that triggers
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* @channel: event channel
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* @comp_list: list of components to watch when event triggers
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*/
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struct counter_event_node {
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struct list_head l;
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u8 event;
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u8 channel;
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struct list_head comp_list;
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};
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/**
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* struct counter_ops - Callbacks from driver
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* @signal_read: optional read callback for Signals. The read level of
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* the respective Signal should be passed back via the
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* level parameter.
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* @count_read: read callback for Counts. The read value of the
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* respective Count should be passed back via the value
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* parameter.
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* @count_write: optional write callback for Counts. The write value for
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* the respective Count is passed in via the value
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* parameter.
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* @function_read: read callback the Count function modes. The read
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* function mode of the respective Count should be passed
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* back via the function parameter.
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* @function_write: optional write callback for Count function modes. The
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* function mode to write for the respective Count is
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* passed in via the function parameter.
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* @action_read: optional read callback the Synapse action modes. The
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* read action mode of the respective Synapse should be
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* passed back via the action parameter.
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* @action_write: optional write callback for Synapse action modes. The
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* action mode to write for the respective Synapse is
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* passed in via the action parameter.
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* @events_configure: optional write callback to configure events. The list of
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* struct counter_event_node may be accessed via the
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* events_list member of the counter parameter.
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* @watch_validate: optional callback to validate a watch. The Counter
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* component watch configuration is passed in via the watch
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* parameter. A return value of 0 indicates a valid Counter
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* component watch configuration.
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*/
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struct counter_ops {
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int (*signal_read)(struct counter_device *counter,
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struct counter_signal *signal,
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enum counter_signal_level *level);
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int (*count_read)(struct counter_device *counter,
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struct counter_count *count, u64 *value);
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int (*count_write)(struct counter_device *counter,
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struct counter_count *count, u64 value);
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int (*function_read)(struct counter_device *counter,
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struct counter_count *count,
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enum counter_function *function);
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int (*function_write)(struct counter_device *counter,
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struct counter_count *count,
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enum counter_function function);
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int (*action_read)(struct counter_device *counter,
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struct counter_count *count,
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struct counter_synapse *synapse,
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enum counter_synapse_action *action);
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int (*action_write)(struct counter_device *counter,
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struct counter_count *count,
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struct counter_synapse *synapse,
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enum counter_synapse_action action);
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int (*events_configure)(struct counter_device *counter);
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int (*watch_validate)(struct counter_device *counter,
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const struct counter_watch *watch);
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};
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/**
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* struct counter_device - Counter data structure
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* @name: name of the device
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* @parent: optional parent device providing the counters
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* @ops: callbacks from driver
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* @signals: array of Signals
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* @num_signals: number of Signals specified in @signals
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* @counts: array of Counts
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* @num_counts: number of Counts specified in @counts
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* @ext: optional array of Counter device extensions
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* @num_ext: number of Counter device extensions specified in @ext
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* @priv: optional private data supplied by driver
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* @dev: internal device structure
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* @chrdev: internal character device structure
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* @events_list: list of current watching Counter events
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* @events_list_lock: lock to protect Counter events list operations
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* @next_events_list: list of next watching Counter events
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* @n_events_list_lock: lock to protect Counter next events list operations
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* @events: queue of detected Counter events
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* @events_wait: wait queue to allow blocking reads of Counter events
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* @events_in_lock: lock to protect Counter events queue in operations
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* @events_out_lock: lock to protect Counter events queue out operations
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* @ops_exist_lock: lock to prevent use during removal
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*/
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struct counter_device {
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const char *name;
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struct device *parent;
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const struct counter_ops *ops;
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struct counter_signal *signals;
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size_t num_signals;
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struct counter_count *counts;
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size_t num_counts;
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struct counter_comp *ext;
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size_t num_ext;
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struct device dev;
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struct cdev chrdev;
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struct list_head events_list;
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spinlock_t events_list_lock;
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struct list_head next_events_list;
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struct mutex n_events_list_lock;
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DECLARE_KFIFO_PTR(events, struct counter_event);
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wait_queue_head_t events_wait;
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spinlock_t events_in_lock;
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struct mutex events_out_lock;
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struct mutex ops_exist_lock;
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};
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void *counter_priv(const struct counter_device *const counter);
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struct counter_device *counter_alloc(size_t sizeof_priv);
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void counter_put(struct counter_device *const counter);
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int counter_add(struct counter_device *const counter);
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void counter_unregister(struct counter_device *const counter);
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struct counter_device *devm_counter_alloc(struct device *dev,
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size_t sizeof_priv);
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int devm_counter_add(struct device *dev,
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struct counter_device *const counter);
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void counter_push_event(struct counter_device *const counter, const u8 event,
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const u8 channel);
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#define COUNTER_COMP_DEVICE_U8(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U8, \
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.name = (_name), \
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.device_u8_read = (_read), \
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.device_u8_write = (_write), \
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}
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#define COUNTER_COMP_COUNT_U8(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U8, \
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.name = (_name), \
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.count_u8_read = (_read), \
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.count_u8_write = (_write), \
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}
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#define COUNTER_COMP_SIGNAL_U8(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U8, \
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.name = (_name), \
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.signal_u8_read = (_read), \
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.signal_u8_write = (_write), \
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}
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#define COUNTER_COMP_DEVICE_U64(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U64, \
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.name = (_name), \
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.device_u64_read = (_read), \
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.device_u64_write = (_write), \
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}
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#define COUNTER_COMP_COUNT_U64(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U64, \
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.name = (_name), \
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.count_u64_read = (_read), \
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.count_u64_write = (_write), \
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}
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#define COUNTER_COMP_SIGNAL_U64(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_U64, \
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.name = (_name), \
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.signal_u64_read = (_read), \
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.signal_u64_write = (_write), \
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}
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#define COUNTER_COMP_DEVICE_BOOL(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_BOOL, \
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.name = (_name), \
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.device_u8_read = (_read), \
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.device_u8_write = (_write), \
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}
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#define COUNTER_COMP_COUNT_BOOL(_name, _read, _write) \
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{ \
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.type = COUNTER_COMP_BOOL, \
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.name = (_name), \
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.count_u8_read = (_read), \
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.count_u8_write = (_write), \
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}
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|
#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), \
|
|
}
|
|
|
|
struct counter_array {
|
|
enum counter_comp_type type;
|
|
const struct counter_available *avail;
|
|
union {
|
|
size_t length;
|
|
size_t idx;
|
|
};
|
|
};
|
|
|
|
#define DEFINE_COUNTER_ARRAY_U64(_name, _length) \
|
|
struct counter_array _name = { \
|
|
.type = COUNTER_COMP_U64, \
|
|
.length = (_length), \
|
|
}
|
|
|
|
#define DEFINE_COUNTER_ARRAY_CAPTURE(_name, _length) \
|
|
DEFINE_COUNTER_ARRAY_U64(_name, _length)
|
|
|
|
#define DEFINE_COUNTER_ARRAY_POLARITY(_name, _available, _length) \
|
|
struct counter_array _name = { \
|
|
.type = COUNTER_COMP_SIGNAL_POLARITY, \
|
|
.avail = &(_available), \
|
|
.length = (_length), \
|
|
}
|
|
|
|
#define COUNTER_COMP_DEVICE_ARRAY_U64(_name, _read, _write, _array) \
|
|
{ \
|
|
.type = COUNTER_COMP_ARRAY, \
|
|
.name = (_name), \
|
|
.device_array_u64_read = (_read), \
|
|
.device_array_u64_write = (_write), \
|
|
.priv = &(_array), \
|
|
}
|
|
#define COUNTER_COMP_COUNT_ARRAY_U64(_name, _read, _write, _array) \
|
|
{ \
|
|
.type = COUNTER_COMP_ARRAY, \
|
|
.name = (_name), \
|
|
.count_array_u64_read = (_read), \
|
|
.count_array_u64_write = (_write), \
|
|
.priv = &(_array), \
|
|
}
|
|
#define COUNTER_COMP_SIGNAL_ARRAY_U64(_name, _read, _write, _array) \
|
|
{ \
|
|
.type = COUNTER_COMP_ARRAY, \
|
|
.name = (_name), \
|
|
.signal_array_u64_read = (_read), \
|
|
.signal_array_u64_write = (_write), \
|
|
.priv = &(_array), \
|
|
}
|
|
|
|
#define COUNTER_COMP_CAPTURE(_read, _write) \
|
|
COUNTER_COMP_COUNT_U64("capture", _read, _write)
|
|
|
|
#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_POLARITY(_read, _write, _available) \
|
|
{ \
|
|
.type = COUNTER_COMP_SIGNAL_POLARITY, \
|
|
.name = "polarity", \
|
|
.signal_u32_read = (_read), \
|
|
.signal_u32_write = (_write), \
|
|
.priv = &(_available), \
|
|
}
|
|
|
|
#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)
|
|
|
|
#define COUNTER_COMP_ARRAY_CAPTURE(_read, _write, _array) \
|
|
COUNTER_COMP_COUNT_ARRAY_U64("capture", _read, _write, _array)
|
|
|
|
#define COUNTER_COMP_ARRAY_POLARITY(_read, _write, _array) \
|
|
{ \
|
|
.type = COUNTER_COMP_ARRAY, \
|
|
.name = "polarity", \
|
|
.signal_array_u32_read = (_read), \
|
|
.signal_array_u32_write = (_write), \
|
|
.priv = &(_array), \
|
|
}
|
|
|
|
#endif /* _COUNTER_H_ */
|