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