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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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 *  HID Haptic support for Linux
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 *
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 *  Copyright (c) 2021 Angela Czubak <[email protected]>
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 */
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#include <linux/hid.h>
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#define HID_HAPTIC_ORDINAL_WAVEFORMNONE 1
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#define HID_HAPTIC_ORDINAL_WAVEFORMSTOP 2
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#define HID_HAPTIC_MODE_DEVICE 0
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#define HID_HAPTIC_MODE_HOST 1
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struct hid_haptic_effect {
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	u8 *report_buf;
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	struct input_dev *input_dev;
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	struct work_struct work;
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	struct list_head control;
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	struct mutex control_mutex;
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};
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struct hid_haptic_effect_node {
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	struct list_head node;
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	struct file *file;
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};
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struct hid_haptic_device {
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	struct input_dev *input_dev;
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	struct hid_device *hdev;
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	struct hid_report *auto_trigger_report;
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	struct mutex auto_trigger_mutex;
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	struct workqueue_struct *wq;
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	struct hid_report *manual_trigger_report;
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	struct mutex manual_trigger_mutex;
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	size_t manual_trigger_report_len;
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	int pressed_state;
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	s32 pressure_sum;
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	s32 force_logical_minimum;
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	s32 force_physical_minimum;
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	s32 force_resolution;
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	u32 mode;
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	u32 default_auto_trigger;
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	u32 vendor_page;
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	u32 vendor_id;
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	u32 max_waveform_id;
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	u32 max_duration_id;
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	u16 *hid_usage_map;
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	u32 *duration_map;
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	u16 press_ordinal;
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	u16 release_ordinal;
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	struct hid_haptic_effect *effect;
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	struct hid_haptic_effect stop_effect;
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};
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#if IS_ENABLED(CONFIG_HID_HAPTIC)
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void hid_haptic_feature_mapping(struct hid_device *hdev,
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				struct hid_haptic_device *haptic,
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				struct hid_field *field, struct hid_usage
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				*usage);
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bool hid_haptic_check_pressure_unit(struct hid_haptic_device *haptic,
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				    struct hid_input *hi, struct hid_field *field);
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int hid_haptic_input_mapping(struct hid_device *hdev,
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			     struct hid_haptic_device *haptic,
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			     struct hid_input *hi,
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			     struct hid_field *field, struct hid_usage *usage,
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			     unsigned long **bit, int *max);
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int hid_haptic_input_configured(struct hid_device *hdev,
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				struct hid_haptic_device *haptic,
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				struct hid_input *hi);
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int hid_haptic_init(struct hid_device *hdev, struct hid_haptic_device **haptic_ptr);
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void hid_haptic_handle_press_release(struct hid_haptic_device *haptic);
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void hid_haptic_pressure_reset(struct hid_haptic_device *haptic);
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void hid_haptic_pressure_increase(struct hid_haptic_device *haptic,
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				  __s32 pressure);
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#else
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static inline
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void hid_haptic_feature_mapping(struct hid_device *hdev,
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				struct hid_haptic_device *haptic,
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				struct hid_field *field, struct hid_usage
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				*usage)
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{}
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static inline
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bool hid_haptic_check_pressure_unit(struct hid_haptic_device *haptic,
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				    struct hid_input *hi, struct hid_field *field)
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{
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	return false;
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}
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static inline
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int hid_haptic_input_mapping(struct hid_device *hdev,
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			     struct hid_haptic_device *haptic,
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			     struct hid_input *hi,
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			     struct hid_field *field, struct hid_usage *usage,
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			     unsigned long **bit, int *max)
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{
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	return 0;
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}
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static inline
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int hid_haptic_input_configured(struct hid_device *hdev,
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				struct hid_haptic_device *haptic,
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				struct hid_input *hi)
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{
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	return 0;
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}
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static inline
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void hid_haptic_reset(struct hid_device *hdev, struct hid_haptic_device *haptic)
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{}
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static inline
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int hid_haptic_init(struct hid_device *hdev, struct hid_haptic_device **haptic_ptr)
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{
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	return 0;
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}
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static inline
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void hid_haptic_handle_press_release(struct hid_haptic_device *haptic) {}
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static inline
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bool hid_haptic_handle_input(struct hid_haptic_device *haptic)
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{
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	return false;
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}
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static inline
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void hid_haptic_pressure_reset(struct hid_haptic_device *haptic) {}
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static inline
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void hid_haptic_pressure_increase(struct hid_haptic_device *haptic,
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				  __s32 pressure)
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{}
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#endif
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