system/bta/include/bta_hh_api.h

/******************************************************************************
 *
 *  Copyright 2002-2012 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 BTA_HH_API_H
#define BTA_HH_API_H

#include <base/strings/stringprintf.h>

#include <cstdint>
#include <string>

#include "internal_include/bt_target.h"
#include "macros.h"
#include "stack/include/bt_hdr.h"
#include "stack/include/hiddefs.h"
#include "stack/include/l2c_api.h"
#include "types/ble_address_with_type.h"

/*****************************************************************************
 *  Constants and Type Definitions
 ****************************************************************************/
#ifndef BTA_HH_DEBUG
#define BTA_HH_DEBUG TRUE
#endif

#ifndef BTA_HH_SSR_MAX_LATENCY_DEF
#define BTA_HH_SSR_MAX_LATENCY_DEF 800 /* 500 ms*/
#endif

#ifndef BTA_HH_SSR_MIN_TOUT_DEF
#define BTA_HH_SSR_MIN_TOUT_DEF 2
#endif

/* BTA HID Host callback events */
#define BTA_HH_ENABLE_EVT 0     /* HH enabled */
#define BTA_HH_DISABLE_EVT 1    /* HH disabled */
#define BTA_HH_OPEN_EVT 2       /* connection opened */
#define BTA_HH_CLOSE_EVT 3      /* connection closed */
#define BTA_HH_GET_RPT_EVT 4    /* BTA_HhGetReport callback */
#define BTA_HH_SET_RPT_EVT 5    /* BTA_HhSetReport callback */
#define BTA_HH_GET_PROTO_EVT 6  /* BTA_GetProtoMode callback */
#define BTA_HH_SET_PROTO_EVT 7  /* BTA_HhSetProtoMode callback */
#define BTA_HH_GET_IDLE_EVT 8   /* BTA_HhGetIdle comes callback */
#define BTA_HH_SET_IDLE_EVT 9   /* BTA_HhSetIdle finish callback */
#define BTA_HH_GET_DSCP_EVT 10  /* Get report descriptor */
#define BTA_HH_ADD_DEV_EVT 11   /* Add Device callback */
#define BTA_HH_RMV_DEV_EVT 12   /* remove device finished */
#define BTA_HH_VC_UNPLUG_EVT 13 /* virtually unplugged */
#define BTA_HH_DATA_EVT 15
#define BTA_HH_API_ERR_EVT 16     /* API error is caught */
#define BTA_HH_UPDATE_SCPP_EVT 17 /* update scan paramter complete */

typedef uint16_t tBTA_HH_EVT;

/* application ID(none-zero) for each type of device */
#define BTA_HH_APP_ID_MI 1
#define BTA_HH_APP_ID_KB 2
#define BTA_HH_APP_ID_RMC 3
#define BTA_HH_APP_ID_3DSG 4
#define BTA_HH_APP_ID_JOY 5
#define BTA_HH_APP_ID_GPAD 6
#define BTA_HH_APP_ID_LE 0xff

/* defined the minimum offset */
#define BTA_HH_MIN_OFFSET (L2CAP_MIN_OFFSET + 1)

/* HID_HOST_MAX_DEVICES can not exceed 15 for th design of BTA HH */
#define BTA_HH_IDX_INVALID 0xff
#define BTA_HH_MAX_KNOWN HID_HOST_MAX_DEVICES

/* GATT_MAX_PHY_CHANNEL can not exceed 14 for the design of BTA HH */
#if GATT_MAX_PHY_CHANNEL > 14
#define BTA_HH_LE_MAX_KNOWN 14
#else
#define BTA_HH_LE_MAX_KNOWN GATT_MAX_PHY_CHANNEL
#endif

#define BTA_HH_MAX_DEVICE (HID_HOST_MAX_DEVICES + BTA_HH_LE_MAX_KNOWN)
/* invalid device handle */
#define BTA_HH_INVALID_HANDLE 0xff

/* type of protocol mode */
#define BTA_HH_PROTO_RPT_MODE (0x00)
#define BTA_HH_PROTO_BOOT_MODE (0x01)
#define BTA_HH_PROTO_UNKNOWN (0xff)
typedef uint8_t tBTA_HH_PROTO_MODE;

enum { BTA_HH_KEYBD_RPT_ID = 1, BTA_HH_MOUSE_RPT_ID };
typedef uint8_t tBTA_HH_BOOT_RPT_ID;

/* type of devices, bit mask */
#define BTA_HH_DEVT_UNKNOWN 0x00
#define BTA_HH_DEVT_JOS 0x01 /* joy stick */
#define BTA_HH_DEVT_GPD 0x02 /* game pad */
#define BTA_HH_DEVT_RMC 0x03 /* remote control */
#define BTA_HH_DEVT_SED 0x04 /* sensing device */
#define BTA_HH_DEVT_DGT 0x05 /* Digitizer tablet */
#define BTA_HH_DEVT_CDR 0x06 /* card reader */
#define BTA_HH_DEVT_KBD 0x10 /* keyboard */
#define BTA_HH_DEVT_MIC 0x20 /* pointing device */
#define BTA_HH_DEVT_COM 0x30 /* Combo keyboard/pointing */
#define BTA_HH_DEVT_OTHER 0x80
typedef uint8_t tBTA_HH_DEVT;

typedef enum : uint8_t {
  BTA_HH_OK = 0,
  BTA_HH_HS_HID_NOT_READY,  /* handshake error : device not ready */
  BTA_HH_HS_INVALID_RPT_ID, /* handshake error : invalid report ID */
  BTA_HH_HS_TRANS_NOT_SPT,  /* handshake error : transaction not spt */
  BTA_HH_HS_INVALID_PARAM,  /* handshake error : invalid paremter */
  BTA_HH_HS_ERROR,          /* handshake error : unspecified HS error */
  BTA_HH_ERR,               /* general BTA HH error */
  BTA_HH_ERR_SDP,           /* SDP error */
  BTA_HH_ERR_PROTO,         /* SET_Protocol error,
                                only used in BTA_HH_OPEN_EVT callback */

  BTA_HH_ERR_DB_FULL,     /* device database full error, used in
                             BTA_HH_OPEN_EVT/BTA_HH_ADD_DEV_EVT */
  BTA_HH_ERR_TOD_UNSPT,   /* type of device not supported */
  BTA_HH_ERR_NO_RES,      /* out of system resources */
  BTA_HH_ERR_AUTH_FAILED, /* authentication fail */
  BTA_HH_ERR_HDL,
  BTA_HH_ERR_SEC,
  BTA_HH_HS_SERVICE_CHANGED /* GATT service changed on the peer */
} tBTA_HH_STATUS;

inline tBTA_HH_STATUS to_bta_hh_status(uint32_t status) {
  return static_cast<tBTA_HH_STATUS>(status);
}

inline std::string bta_hh_status_text(const tBTA_HH_STATUS& status) {
  switch (status) {
    CASE_RETURN_TEXT(BTA_HH_OK);
    CASE_RETURN_TEXT(BTA_HH_HS_HID_NOT_READY);
    CASE_RETURN_TEXT(BTA_HH_HS_INVALID_RPT_ID);
    CASE_RETURN_TEXT(BTA_HH_HS_TRANS_NOT_SPT);
    CASE_RETURN_TEXT(BTA_HH_HS_INVALID_PARAM);
    CASE_RETURN_TEXT(BTA_HH_HS_ERROR);
    CASE_RETURN_TEXT(BTA_HH_ERR);
    CASE_RETURN_TEXT(BTA_HH_ERR_SDP);
    CASE_RETURN_TEXT(BTA_HH_ERR_PROTO);
    CASE_RETURN_TEXT(BTA_HH_ERR_DB_FULL);
    CASE_RETURN_TEXT(BTA_HH_ERR_TOD_UNSPT);
    CASE_RETURN_TEXT(BTA_HH_ERR_NO_RES);
    CASE_RETURN_TEXT(BTA_HH_ERR_AUTH_FAILED);
    CASE_RETURN_TEXT(BTA_HH_ERR_HDL);
    CASE_RETURN_TEXT(BTA_HH_ERR_SEC);
    default:
      return base::StringPrintf("UNKNOWN[%hhu]", status);
  }
}

typedef uint16_t tBTA_HH_ATTR_MASK;

/* supported type of device and corresponding application ID */
typedef struct {
  tBTA_HH_DEVT tod; /* type of device               */
  uint8_t app_id;   /* corresponding application ID */
} tBTA_HH_SPT_TOD;

/* configuration struct */
typedef struct {
  uint8_t max_devt_spt;         /* max number of types of devices spt */
  tBTA_HH_SPT_TOD* p_devt_list; /* supported types of device list     */
  uint16_t sdp_db_size;
} tBTA_HH_CFG;

enum {
  BTA_HH_RPTT_RESRV,  /* reserved         */
  BTA_HH_RPTT_INPUT,  /* input report     */
  BTA_HH_RPTT_OUTPUT, /* output report    */
  BTA_HH_RPTT_FEATURE /* feature report   */
};
typedef uint8_t tBTA_HH_RPT_TYPE;

/* HID_CONTROL operation code used in BTA_HhSendCtrl()
*/
enum {
  BTA_HH_CTRL_NOP = 0 + HID_PAR_CONTROL_NOP, /* mapping from BTE */
  BTA_HH_CTRL_HARD_RESET,                    /* hard reset       */
  BTA_HH_CTRL_SOFT_RESET,                    /* soft reset       */
  BTA_HH_CTRL_SUSPEND,                       /* enter suspend    */
  BTA_HH_CTRL_EXIT_SUSPEND,                  /* exit suspend     */
  BTA_HH_CTRL_VIRTUAL_CABLE_UNPLUG           /* virtual unplug   */
};
typedef uint8_t tBTA_HH_TRANS_CTRL_TYPE;

typedef tHID_DEV_DSCP_INFO tBTA_HH_DEV_DESCR;

#define BTA_HH_SSR_PARAM_INVALID HID_SSR_PARAM_INVALID

/* id DI is not existing in remote device, vendor_id in tBTA_HH_DEV_DSCP_INFO
 * will be set to 0xffff */
#define BTA_HH_VENDOR_ID_INVALID 0xffff

/* report descriptor information */
typedef struct {
  uint16_t vendor_id;       /* vendor ID */
  uint16_t product_id;      /* product ID */
  uint16_t version;         /* version */
  uint16_t ssr_max_latency; /* SSR max latency, BTA_HH_SSR_PARAM_INVALID if
                               unknown */
  uint16_t
      ssr_min_tout;  /* SSR min timeout, BTA_HH_SSR_PARAM_INVALID if unknown */
  uint8_t ctry_code; /*Country Code.*/
#define BTA_HH_LE_REMOTE_WAKE 0x01
#define BTA_HH_LE_NORMAL_CONN 0x02

  uint8_t flag;
  tBTA_HH_DEV_DESCR descriptor;
  uint8_t hid_handle;

  std::string ToString() const {
    return base::StringPrintf("%04x::%04x::%04x", vendor_id, product_id,
                              version);
  }
} tBTA_HH_DEV_DSCP_INFO;

/* callback event data for BTA_HH_OPEN_EVT */
typedef struct {
  tAclLinkSpec link_spec; /* HID device ACL link specification */
  tBTA_HH_STATUS status; /* operation status         */
  uint8_t handle;        /* device handle            */
  bool le_hid;           /* is LE devices? */
  bool scps_supported;   /* scan parameter service supported */
  uint8_t sub_class;     /* Cod sub class */
  uint16_t attr_mask;    /* attribute mask */
  uint8_t app_id;
} tBTA_HH_CONN;

typedef tBTA_HH_CONN tBTA_HH_DEV_INFO;

/* callback event data */
typedef struct {
  tBTA_HH_STATUS status; /* operation status         */
  uint8_t handle;        /* device handle            */
} tBTA_HH_CBDATA;

enum {
  BTA_HH_MOD_CTRL_KEY,
  BTA_HH_MOD_SHFT_KEY,
  BTA_HH_MOD_ALT_KEY,
  BTA_HH_MOD_GUI_KEY,
  BTA_HH_MOD_MAX_KEY
};

/* parsed boot mode keyboard report */
typedef struct {
  uint8_t this_char[6]; /* virtual key code     */
  bool mod_key[BTA_HH_MOD_MAX_KEY];
  /* ctrl, shift, Alt, GUI */
  /* modifier key: is Shift key pressed */
  /* modifier key: is Ctrl key pressed  */
  /* modifier key: is Alt key pressed   */
  /* modifier key: GUI up/down */
  bool caps_lock; /* is caps locked       */
  bool num_lock;  /* is Num key pressed   */
} tBTA_HH_KEYBD_RPT;

/* parsed boot mode mouse report */
typedef struct {
  uint8_t mouse_button; /* mouse button is clicked   */
  int8_t delta_x;       /* displacement x            */
  int8_t delta_y;       /* displacement y            */
} tBTA_HH_MICE_RPT;

/* parsed Boot report */
typedef struct {
  tBTA_HH_BOOT_RPT_ID dev_type; /* type of device report */
  union {
    tBTA_HH_KEYBD_RPT keybd_rpt; /* keyboard report      */
    tBTA_HH_MICE_RPT mice_rpt;   /* mouse report         */
  } data_rpt;
} tBTA_HH_BOOT_RPT;

/* handshake data */
typedef struct {
  tBTA_HH_STATUS status; /* handshake status */
  uint8_t handle;        /* device handle    */
  union {
    tBTA_HH_PROTO_MODE proto_mode; /* GET_PROTO_EVT :protocol mode */
    BT_HDR* p_rpt_data;            /* GET_RPT_EVT   : report data  */
    uint8_t idle_rate;             /* GET_IDLE_EVT  : idle rate    */
  } rsp_data;

} tBTA_HH_HSDATA;

/* union of data associated with HD callback */
typedef union {
  tBTA_HH_DEV_INFO dev_info; /* BTA_HH_ADD_DEV_EVT, BTA_HH_RMV_DEV_EVT   */
  tBTA_HH_CONN conn;         /* BTA_HH_OPEN_EVT      */
  tBTA_HH_CBDATA dev_status; /* BTA_HH_CLOSE_EVT,
                                BTA_HH_SET_PROTO_EVT
                                BTA_HH_SET_RPT_EVT
                                BTA_HH_SET_IDLE_EVT
                                BTA_HH_UPDATE_SCPP_EVT */

  tBTA_HH_STATUS status;           /* BTA_HH_ENABLE_EVT */
  tBTA_HH_DEV_DSCP_INFO dscp_info; /* BTA_HH_GET_DSCP_EVT */
  tBTA_HH_HSDATA hs_data;          /* GET_ transaction callback
                                      BTA_HH_GET_RPT_EVT
                                      BTA_HH_GET_PROTO_EVT
                                      BTA_HH_GET_IDLE_EVT */
} tBTA_HH;

/* BTA HH callback function */
typedef void(tBTA_HH_CBACK)(tBTA_HH_EVT event, tBTA_HH* p_data);

/*****************************************************************************
 *  External Function Declarations
 ****************************************************************************/

/*******************************************************************************
 *
 * Function         BTA_HhEnable
 *
 * Description      This function enable HID host and registers HID-Host with
 *                  lower layers.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhEnable(tBTA_HH_CBACK* p_cback, bool enable_hid, bool enable_hogp);

/*******************************************************************************
 *
 * Function         BTA_HhDisable
 *
 * Description      This function is called when the host is about power down.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhDisable(void);

/*******************************************************************************
 *
 * Function         BTA_HhOpen
 *
 * Description      This function is called to start an inquiry and read SDP
 *                  record of responding devices; connect to a device if only
 *                  one active HID device is found.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhOpen(const tAclLinkSpec& link_spec);

/*******************************************************************************
 *
 * Function         BTA_HhClose
 *
 * Description      This function disconnects the device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhClose(uint8_t dev_handle);

/*******************************************************************************
 *
 * Function         BTA_HhSetProtoMode
 *
 * Description      This function set the protocol mode at specified HID handle
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSetProtoMode(uint8_t handle, tBTA_HH_PROTO_MODE t_type);

/*******************************************************************************
 *
 * Function         BTA_HhGetProtoMode
 *
 * Description      This function get the protocol mode of a specified HID
 *                  device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhGetProtoMode(uint8_t dev_handle);
/*******************************************************************************
 *
 * Function         BTA_HhSetReport
 *
 * Description      send SET_REPORT to device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSetReport(uint8_t dev_handle, tBTA_HH_RPT_TYPE r_type,
                     BT_HDR* p_data);

/*******************************************************************************
 *
 * Function         BTA_HhGetReport
 *
 * Description      Send a GET_REPORT to HID device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhGetReport(uint8_t dev_handle, tBTA_HH_RPT_TYPE r_type,
                     uint8_t rpt_id, uint16_t buf_size);
/*******************************************************************************
 *
 * Function         BTA_HhSetIdle
 *
 * Description      send SET_IDLE to device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSetIdle(uint8_t dev_handle, uint16_t idle_rate);

/*******************************************************************************
 *
 * Function         BTA_HhGetIdle
 *
 * Description      Send a GET_IDLE to HID device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhGetIdle(uint8_t dev_handle);

/*******************************************************************************
 *
 * Function         BTA_HhSendCtrl
 *
 * Description      Send HID_CONTROL request to a HID device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSendCtrl(uint8_t dev_handle, tBTA_HH_TRANS_CTRL_TYPE c_type);

/*******************************************************************************
 *
 * Function         BTA_HhSetIdle
 *
 * Description      send SET_IDLE to device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSetIdle(uint8_t dev_handle, uint16_t idle_rate);

/*******************************************************************************
 *
 * Function         BTA_HhGetIdle
 *
 * Description      Send a GET_IDLE from HID device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhGetIdle(uint8_t dev_handle);

/*******************************************************************************
 *
 * Function         BTA_HhSendData
 *
 * Description      Send DATA transaction to a HID device.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhSendData(uint8_t dev_handle, const tAclLinkSpec& link_spec,
                    BT_HDR* p_buf);

/*******************************************************************************
 *
 * Function         BTA_HhGetDscpInfo
 *
 * Description      Get report descriptor of the device
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhGetDscpInfo(uint8_t dev_handle);

/*******************************************************************************
 * Function         BTA_HhAddDev
 *
 * Description      Add a virtually cabled device into HID-Host device list
 *                  to manage and assign a device handle for future API call,
 *                  host applciation call this API at start-up to initialize its
 *                  virtually cabled devices.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhAddDev(const tAclLinkSpec& link_spec, tBTA_HH_ATTR_MASK attr_mask,
                  uint8_t sub_class, uint8_t app_id,
                  tBTA_HH_DEV_DSCP_INFO dscp_info);
/*******************************************************************************
 *
 * Function         BTA_HhRemoveDev
 *
 * Description      Remove a device from the HID host devices list.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_HhRemoveDev(uint8_t dev_handle);

#endif /* BTA_HH_API_H */