InputDriver.cpp revision 6f783602c05c519238200fed55b0afa097737ca1 
1/*
2 * Copyright (C) 2015 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 <stdint.h>
18#include <sys/types.h>
19
20#define LOG_TAG "InputDriver"
21
22#define LOG_NDEBUG 0
23
24#include "InputDriver.h"
25#include "InputHost.h"
26
27#include <hardware/input.h>
28#include <utils/Log.h>
29#include <utils/String8.h>
30
31#define INDENT2 "    "
32
33namespace android {
34
35static input_host_callbacks_t kCallbacks = {
36    .create_device_identifier = create_device_identifier,
37    .create_device_definition = create_device_definition,
38    .create_input_report_definition = create_input_report_definition,
39    .create_output_report_definition = create_output_report_definition,
40    .input_device_definition_add_report = input_device_definition_add_report,
41    .input_report_definition_add_collection = input_report_definition_add_collection,
42    .input_report_definition_declare_usage_int = input_report_definition_declare_usage_int,
43    .input_report_definition_declare_usages_bool = input_report_definition_declare_usages_bool,
44    .register_device = register_device,
45    .input_allocate_report = input_allocate_report,
46    .report_event = report_event,
47};
48
49InputDriver::InputDriver(const char* name) : mName(String8(name)) {
50    const hw_module_t* module;
51    int err = input_open(&module, name);
52    LOG_ALWAYS_FATAL_IF(err != 0, "Input module %s not found", name);
53    mHal = reinterpret_cast<const input_module_t*>(module);
54}
55
56void InputDriver::init(InputHostInterface* host) {
57    mHal->init(mHal, static_cast<input_host_t*>(host), kCallbacks);
58}
59
60void InputDriver::dump(String8& result) {
61    result.appendFormat(INDENT2 "HAL Input Driver (%s)\n", mName.string());
62}
63
64
65// HAL wrapper functions
66
67input_device_identifier_t* create_device_identifier(input_host_t* host,
68        const char* name, int32_t product_id, int32_t vendor_id,
69        input_bus_t bus, const char* unique_id) {
70    return nullptr;
71}
72
73input_device_definition_t* create_device_definition(input_host_t* host) {
74    return nullptr;
75}
76
77input_report_definition_t* create_input_report_definition(input_host_t* host) {
78    return nullptr;
79}
80
81input_report_definition_t* create_output_report_definition(input_host_t* host) {
82    return nullptr;
83}
84
85void input_device_definition_add_report(input_host_t* host,
86        input_device_definition_t* d, input_report_definition_t* r) { }
87
88void input_report_definition_add_collection(input_host_t* host,
89        input_report_definition_t* report, input_collection_id_t id, int32_t arity) { }
90
91void input_report_definition_declare_usage_int(input_host_t* host,
92        input_report_definition_t* report, input_collection_id_t id,
93        input_usage_t usage, int32_t min, int32_t max, float resolution) { }
94
95void input_report_definition_declare_usages_bool(input_host_t* host,
96        input_report_definition_t* report, input_collection_id_t id,
97        input_usage_t* usage, size_t usage_count) { }
98
99
100input_device_handle_t* register_device(input_host_t* host,
101        input_device_identifier_t* id, input_device_definition_t* d) {
102    return nullptr;
103}
104
105input_report_t* input_allocate_report(input_host_t* host, input_report_definition_t* r) {
106    return nullptr;
107}
108
109void report_event(input_host_t* host, input_device_handle_t* d, input_report_t* report) { }
110
111
112} // namespace android
113