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113 lines
3.0 KiB
113 lines
3.0 KiB
4 months ago
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "local_time_hw_default"
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//#define LOG_NDEBUG 0
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#include <errno.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <string.h>
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#include <time.h>
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#include <log/log.h>
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#include <hardware/hardware.h>
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#include <hardware/local_time_hal.h>
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// We only support gcc and clang, both of which support this attribute.
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#define UNUSED_ARGUMENT __attribute((unused))
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struct stub_local_time_device {
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struct local_time_hw_device device;
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};
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static int64_t ltdev_get_local_time(struct local_time_hw_device* dev)
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{
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struct timespec ts;
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uint64_t now;
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int ret;
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ret = clock_gettime(CLOCK_MONOTONIC, &ts);
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if (ret < 0) {
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ALOGW("%s failed to fetch CLOCK_MONOTONIC value! (res = %d)",
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dev->common.module->name, ret);
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return 0;
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}
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now = (((uint64_t)ts.tv_sec) * 1000000000ull) +
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((uint64_t)ts.tv_nsec);
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return (int64_t)now;
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}
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static uint64_t ltdev_get_local_freq(
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struct local_time_hw_device* dev UNUSED_ARGUMENT)
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{
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// For better or worse, linux clock_gettime routines normalize all clock
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// frequencies to 1GHz
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return 1000000000ull;
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}
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static int ltdev_close(hw_device_t *device)
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{
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free(device);
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return 0;
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}
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static int ltdev_open(const hw_module_t* module, const char* name,
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hw_device_t** device)
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{
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struct stub_local_time_device *ltdev;
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if (strcmp(name, LOCAL_TIME_HARDWARE_INTERFACE) != 0)
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return -EINVAL;
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ltdev = calloc(1, sizeof(struct stub_local_time_device));
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if (!ltdev)
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return -ENOMEM;
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ltdev->device.common.tag = HARDWARE_DEVICE_TAG;
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ltdev->device.common.version = 0;
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ltdev->device.common.module = (struct hw_module_t *) module;
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ltdev->device.common.close = ltdev_close;
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ltdev->device.get_local_time = ltdev_get_local_time;
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ltdev->device.get_local_freq = ltdev_get_local_freq;
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ltdev->device.set_local_slew = NULL;
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ltdev->device.get_debug_log = NULL;
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*device = <dev->device.common;
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return 0;
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}
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static struct hw_module_methods_t hal_module_methods = {
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.open = ltdev_open,
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};
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struct local_time_module HAL_MODULE_INFO_SYM = {
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.common = {
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.tag = HARDWARE_MODULE_TAG,
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.version_major = 1,
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.version_minor = 0,
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.id = LOCAL_TIME_HARDWARE_MODULE_ID,
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.name = "Default local_time HW HAL",
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.author = "The Android Open Source Project",
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.methods = &hal_module_methods,
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},
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};
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