drivers/bluetooth/profiles/gatt/hid/hog.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <stdbool.h>

#include <ddk/binding.h>
#include <ddk/debug.h>
#include <ddk/device.h>
#include <ddk/driver.h>
#include <ddk/protocol/bt/gattsvc.h>
#include <ddk/protocol/hidbus.h>

#include <threads.h>

// org.bluetooth.characteristic.protocol_mode
#define BT_HOG_PROTOCOL_MODE 0x2A4E
#define BT_HOG_PROTOCOL_MODE_BOOT_MODE 0
#define BT_HOG_PROTOCOL_MODE_REPORT_MODE 1

// org.bluetooth.characteristic.report_map
#define BT_HOG_REPORT_MAP 0x2A4B

// org.bluetooth.characteristic.report
#define BT_HOG_REPORT 0x2A4D

// org.bluetooth.characteristic.boot_keyboard_input_report
#define BT_HOG_BOOT_KEYBOARD_INPUT_REPORT 0x2A22

// org.bluetooth.characteristic.boot_keyboard_output_report
#define BT_HOG_BOOT_KEYBOARD_OUTPUT_REPORT 0x2A32

// org.bluetooth.characteristic.boot_mouse_input_report
#define BT_HOG_BOOT_MOUSE_INPUT_REPORT 0x2A33

typedef enum {
    HOGD_DEVICE_BOOT_KEYBOARD,
    HOGD_DEVICE_BOOT_MOUSE,
    HOGD_DEVICE_REPORT,
} hogd_device_type_t;

typedef struct hogd_t hogd_t;
typedef struct hogd_device_t hogd_device_t;
struct hogd_device_t {
    hogd_device_type_t device_type;

    bt_gatt_id_t input_report_id;
    bool has_input_report_id;
    bt_gatt_id_t output_report_id;
    bool has_output_report_id;

    bool is_initialized;
    zx_device_t* dev;
    mtx_t lock;
    hidbus_ifc_t ifc;

    // Reference to owner.
    hogd_t *parent;

    // Report devices are stored as a singly linked list. Currently unused.
    hogd_device_t *next;
};

struct hogd_t {
  bt_gatt_svc_protocol_t gatt_svc;

  bool has_report_map;
  bt_gatt_id_t report_map_id;

  bool has_protocol_mode;
  bt_gatt_id_t protocol_mode_id;

  uint8_t protocol_mode;

  void* hid_descriptor;
  size_t hid_descriptor_len;

  zx_device_t* bus_dev;

  hogd_device_t boot_keyboard_device;
  hogd_device_t boot_mouse_device;

  // Report devices are stored as a singly linked list.
  hogd_device_t *report_device;
};