1/*
2 * Copyright (C) 2011 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#define LOG_TAG "local_time_hw_default"
18//#define LOG_NDEBUG 0
19
20#include <errno.h>
21#include <stdint.h>
22#include <sys/time.h>
23#include <linux/time.h>
24
25#include <cutils/log.h>
26
27#include <hardware/hardware.h>
28#include <hardware/local_time_hal.h>
29
30struct stub_local_time_device {
31    struct local_time_hw_device device;
32};
33
34static int64_t ltdev_get_local_time(struct local_time_hw_device* dev)
35{
36    struct timespec ts;
37    uint64_t now;
38    int ret;
39
40    ret = clock_gettime(CLOCK_MONOTONIC, &ts);
41    if (ret < 0) {
42        ALOGW("%s failed to fetch CLOCK_MONOTONIC value! (res = %d)",
43                dev->common.module->name, ret);
44        return 0;
45    }
46
47    now = (((uint64_t)ts.tv_sec) * 1000000000ull) +
48           ((uint64_t)ts.tv_nsec);
49
50    return (int64_t)now;
51}
52
53static uint64_t ltdev_get_local_freq(struct local_time_hw_device* dev)
54{
55    // For better or worse, linux clock_gettime routines normalize all clock
56    // frequencies to 1GHz
57    return 1000000000ull;
58}
59
60static int ltdev_close(hw_device_t *device)
61{
62    free(device);
63    return 0;
64}
65
66static int ltdev_open(const hw_module_t* module, const char* name,
67                     hw_device_t** device)
68{
69    struct stub_local_time_device *ltdev;
70    struct timespec ts;
71    int ret;
72
73    if (strcmp(name, LOCAL_TIME_HARDWARE_INTERFACE) != 0)
74        return -EINVAL;
75
76    ltdev = calloc(1, sizeof(struct stub_local_time_device));
77    if (!ltdev)
78        return -ENOMEM;
79
80    ltdev->device.common.tag = HARDWARE_DEVICE_TAG;
81    ltdev->device.common.version = 0;
82    ltdev->device.common.module = (struct hw_module_t *) module;
83    ltdev->device.common.close = ltdev_close;
84
85    ltdev->device.get_local_time = ltdev_get_local_time;
86    ltdev->device.get_local_freq = ltdev_get_local_freq;
87    ltdev->device.set_local_slew = NULL;
88    ltdev->device.get_debug_log  = NULL;
89
90    *device = &ltdev->device.common;
91
92    return 0;
93}
94
95static struct hw_module_methods_t hal_module_methods = {
96    .open = ltdev_open,
97};
98
99struct local_time_module HAL_MODULE_INFO_SYM = {
100    .common = {
101        .tag = HARDWARE_MODULE_TAG,
102        .version_major = 1,
103        .version_minor = 0,
104        .id = LOCAL_TIME_HARDWARE_MODULE_ID,
105        .name = "Default local_time HW HAL",
106        .author = "The Android Open Source Project",
107        .methods = &hal_module_methods,
108    },
109};
110