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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef APP_TO_HOST_EVENT_H_
     18 #define APP_TO_HOST_EVENT_H_
     19 
     20 #include "contexthub.h"
     21 #include "nanomessage.h"
     22 
     23 namespace android {
     24 
     25 // Copied from nanohub eventnums.h
     26 struct HostHubRawPacket {
     27     uint64_t appId;
     28     uint8_t dataLen; //not incl this header, 128 bytes max
     29     //raw data in unspecified format here
     30 } __attribute((packed));
     31 
     32 // From brHostEvent.h
     33 #define BRIDGE_HOST_EVENT_MSG_VERSION_INFO (0)
     34 
     35 struct BrHostEventData {
     36     uint8_t msgId;
     37     uint8_t reserved;
     38     uint8_t status;
     39     uint8_t payload[];
     40 } __attribute__((packed));
     41 
     42 struct BrHostEventTx {
     43     struct HostHubRawPacket hdr;
     44     struct BrHostEventData  data;
     45 } __attribute__((packed));
     46 
     47 // From brPkt.h
     48 struct BrVersionInfoRsp {
     49     uint16_t hwType;
     50     uint16_t osVer;
     51     uint32_t variantVer;
     52     uint32_t bridgeVer;
     53 } __attribute__((packed));
     54 
     55 // The u64 appId used in nanohub is 40 bits vendor ID + 24 bits app ID (see seos.h)
     56 constexpr uint64_t MakeAppId(uint64_t vendorId, uint32_t appId) {
     57     return (vendorId << 24) | (appId & 0x00FFFFFF);
     58 }
     59 
     60 constexpr uint64_t kAppIdVendorGoogle = 0x476f6f676cULL; // "Googl"
     61 
     62 constexpr uint64_t kAppIdBoschBmi160Bmm150 = MakeAppId(kAppIdVendorGoogle, 2);
     63 constexpr uint64_t kAppIdBoschBmp280       = MakeAppId(kAppIdVendorGoogle, 5);
     64 constexpr uint64_t kAppIdAmsTmd2772        = MakeAppId(kAppIdVendorGoogle, 9);
     65 constexpr uint64_t kAppIdRohmRpr0521       = MakeAppId(kAppIdVendorGoogle, 10);
     66 constexpr uint64_t kAppIdAmsTmd4903        = MakeAppId(kAppIdVendorGoogle, 12);
     67 
     68 constexpr uint64_t kAppIdBridge = MakeAppId(kAppIdVendorGoogle, 50);
     69 
     70 /*
     71  * These classes represent events sent with event type EVT_APP_TO_HOST. This is
     72  * a generic container for arbitrary application-specific data, and is used for
     73  * passing back sensor calibration results, implementing app download, etc. The
     74  * parser must know the application ID to determine the data format.
     75  */
     76 
     77 class AppToHostEvent : public ReadEventResponse {
     78   public:
     79     /*
     80      * Constructs and populates an AppToHostEvent instance. Returns nullptr if
     81      * the packet is malformed. The rest of the methods in this class are not
     82      * guaranteed to be safe unless the object is constructed from this
     83      * function.
     84      */
     85     static std::unique_ptr<AppToHostEvent> FromBytes(
     86         const std::vector<uint8_t>& buffer);
     87 
     88     uint64_t GetAppId() const;
     89     // Gets the length of the application-specific data segment
     90     uint8_t GetDataLen() const;
     91     // Returns a pointer to the application-specific data (i.e. past the header)
     92     const uint8_t *GetDataPtr() const;
     93 
     94     bool IsCalibrationEventForSensor(SensorType sensor_type) const;
     95     bool IsTestEventForSensor(SensorType sensor_type) const;
     96     virtual bool IsValid() const;
     97 
     98   protected:
     99     const HostHubRawPacket *GetTypedData() const;
    100     bool CheckAppId(SensorType sensor_type) const;
    101     bool CheckEventHeader(SensorType sensor_type) const;
    102 };
    103 
    104 #define SENSOR_APP_MSG_CALIBRATION_RESULT (0)
    105 #define SENSOR_APP_MSG_TEST_RESULT        (1)
    106 
    107 struct SensorAppEventHeader {
    108     uint8_t msgId;
    109     uint8_t sensorType;
    110     uint8_t status; // 0 for success
    111 } __attribute__((packed));
    112 
    113 struct SingleAxisCalibrationResult : public SensorAppEventHeader {
    114     int32_t bias;
    115 } __attribute__((packed));
    116 
    117 struct TripleAxisCalibrationResult : public SensorAppEventHeader {
    118     int32_t xBias;
    119     int32_t yBias;
    120     int32_t zBias;
    121 } __attribute__((packed));
    122 
    123 struct FloatCalibrationResult : public SensorAppEventHeader {
    124     float value;
    125 } __attribute__((packed));
    126 
    127 struct FourAxisCalibrationResult : public SensorAppEventHeader {
    128     int32_t xBias;
    129     int32_t yBias;
    130     int32_t zBias;
    131     int32_t wBias;
    132 } __attribute__((packed));
    133 
    134 
    135 }  // namespace android
    136 
    137 #endif // APP_TO_HOST_EVENT_H_
    138