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diff --git a/btif/include/btif_hh.h b/btif/include/btif_hh.h
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+/******************************************************************************
+ *
+ * Copyright (C) 2009-2012 Broadcom Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+#ifndef BTIF_HH_H
+#define BTIF_HH_H
+
+#include <hardware/bluetooth.h>
+#include <hardware/bt_hh.h>
+#include <stdint.h>
+#include "bta_hh_api.h"
+
+/*******************************************************************************
+** Constants & Macros
+********************************************************************************/
+
+#define BTIF_HH_MAX_HID 8
+#define BTIF_HH_MAX_ADDED_DEV 32
+
+#define BTIF_HH_MAX_KEYSTATES 3
+#define BTIF_HH_KEYSTATE_MASK_NUMLOCK 0x01
+#define BTIF_HH_KEYSTATE_MASK_CAPSLOCK 0x02
+#define BTIF_HH_KEYSTATE_MASK_SCROLLLOCK 0x04
+
+
+/*******************************************************************************
+** Type definitions and return values
+********************************************************************************/
+
+typedef enum
+{
+ BTIF_HH_DISABLED = 0,
+ BTIF_HH_ENABLED,
+ BTIF_HH_DISABLING,
+ BTIF_HH_DEV_UNKNOWN,
+ BTIF_HH_DEV_CONNECTING,
+ BTIF_HH_DEV_CONNECTED,
+ BTIF_HH_DEV_DISCONNECTED
+} BTIF_HH_STATUS;
+
+typedef struct
+{
+ bthh_connection_state_t dev_status;
+ UINT8 dev_handle;
+ bt_bdaddr_t bd_addr;
+ tBTA_HH_ATTR_MASK attr_mask;
+ UINT8 sub_class;
+ UINT8 app_id;
+ int fd;
+ BT_HDR *p_buf;
+} btif_hh_device_t;
+
+/* Control block to maintain properties of devices */
+typedef struct
+{
+ UINT8 dev_handle;
+ bt_bdaddr_t bd_addr;
+ tBTA_HH_ATTR_MASK attr_mask;
+} btif_hh_added_device_t;
+
+/**
+ * BTIF-HH control block to maintain added devices and currently
+ * connected hid devices
+ */
+typedef struct
+{
+ BTIF_HH_STATUS status;
+ btif_hh_device_t devices[BTIF_HH_MAX_HID];
+ UINT32 device_num;
+ btif_hh_added_device_t added_devices[BTIF_HH_MAX_ADDED_DEV];
+ btif_hh_device_t *p_curr_dev;
+} btif_hh_cb_t;
+
+
+/*******************************************************************************
+** Functions
+********************************************************************************/
+
+extern btif_hh_cb_t btif_hh_cb;
+
+extern btif_hh_device_t *btif_hh_find_connected_dev_by_handle(UINT8 handle);
+extern void btif_hh_remove_device(bt_bdaddr_t bd_addr);
+extern bt_status_t btif_hh_virtual_unplug(bt_bdaddr_t *bd_addr);
+extern void btif_hh_disconnect(bt_bdaddr_t *bd_addr);
+
+BOOLEAN btif_hh_add_added_dev(bt_bdaddr_t bd_addr, tBTA_HH_ATTR_MASK attr_mask);
+
+#endif