1 /**
2  * Copyright (C) 2020 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 #include <stdbool.h>
18 #include <stdint.h>
19 
20 #include "chpp/common/wwan.h"
21 #include "chpp/services/wwan.h"
22 #include "chre/pal/wwan.h"
23 
24 static const struct chrePalSystemApi *gSystemApi;
25 static const struct chrePalWwanCallbacks *gCallbacks;
26 
27 static bool wwanPalOpen(const struct chrePalSystemApi *systemApi,
28                         const struct chrePalWwanCallbacks *callbacks) {
29   gSystemApi = systemApi;
30   gCallbacks = callbacks;
31 
32   return true;
33 }
34 
35 static void wwanPalClose(void) {}
36 
37 static uint32_t wwanPalGetCapabilities(void) {
38   return CHRE_WWAN_GET_CELL_INFO;
39 }
40 
41 static bool wwanPalRequestCellInfo(void) {
42   struct chreWwanCellInfoResult *result =
43       gSystemApi->memoryAlloc(sizeof(struct chreWwanCellInfoResult));
44   CHPP_NOT_NULL(result);
45 
46   // TODO: <populate result>
47 
48   if (result->cellInfoCount > 0) {
49     result->cells = gSystemApi->memoryAlloc(result->cellInfoCount *
50                                             sizeof(struct chreWwanCellInfo));
51     CHPP_NOT_NULL(cells);
52   }
53 
54   // TODO: <populate cells>
55 
56   gCallbacks->cellInfoResultCallback(result);
57 
58   return true;  // If successful
59 }
60 
61 static void wwanPalReleaseCellInfoResult(
62     struct chreWwanCellInfoResult *result) {
63   gSystemApi->memoryFree(CHPP_CONST_CAST_POINTER(result->cells));
64   gSystemApi->memoryFree(result);
65 }
66 
67 #ifdef CHPP_SERVICE_ENABLED_WWAN
68 const struct chrePalWwanApi *chrePalWwanGetApi(uint32_t requestedApiVersion) {
69   static const struct chrePalWwanApi api = {
70       .moduleVersion = CHPP_PAL_WWAN_API_VERSION,
71       .open = wwanPalOpen,
72       .close = wwanPalClose,
73       .getCapabilities = wwanPalGetCapabilities,
74       .requestCellInfo = wwanPalRequestCellInfo,
75       .releaseCellInfoResult = wwanPalReleaseCellInfoResult,
76   };
77 
78   CHPP_STATIC_ASSERT(
79       CHRE_PAL_WWAN_API_CURRENT_VERSION == CHPP_PAL_WWAN_API_VERSION,
80       "A newer CHRE PAL API version is available. Please update.");
81 
82   if (!CHRE_PAL_VERSIONS_ARE_COMPATIBLE(api.moduleVersion,
83                                         requestedApiVersion)) {
84     return NULL;
85   } else {
86     return &api;
87   }
88 }
89 #endif
90