diff options
Diffstat (limited to 'modules/local_time/local_time_hw.c')
-rw-r--r-- | modules/local_time/local_time_hw.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/modules/local_time/local_time_hw.c b/modules/local_time/local_time_hw.c new file mode 100644 index 0000000..a1f5d43 --- /dev/null +++ b/modules/local_time/local_time_hw.c @@ -0,0 +1,109 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "local_time_hw_default" +//#define LOG_NDEBUG 0 + +#include <errno.h> +#include <stdint.h> +#include <sys/time.h> +#include <linux/time.h> + +#include <cutils/log.h> + +#include <hardware/hardware.h> +#include <hardware/local_time_hal.h> + +struct stub_local_time_device { + struct local_time_hw_device device; +}; + +static int64_t ltdev_get_local_time(struct local_time_hw_device* dev) +{ + struct timespec ts; + uint64_t now; + int ret; + + ret = clock_gettime(CLOCK_MONOTONIC, &ts); + if (ret < 0) { + LOGW("%s failed to fetch CLOCK_MONOTONIC value! (res = %d)", + dev->common.module->name, ret); + return 0; + } + + now = (((uint64_t)ts.tv_sec) * 1000000000ull) + + ((uint64_t)ts.tv_nsec); + + return (int64_t)now; +} + +static uint64_t ltdev_get_local_freq(struct local_time_hw_device* dev) +{ + // For better or worse, linux clock_gettime routines normalize all clock + // frequencies to 1GHz + return 1000000000ull; +} + +static int ltdev_close(hw_device_t *device) +{ + free(device); + return 0; +} + +static int ltdev_open(const hw_module_t* module, const char* name, + hw_device_t** device) +{ + struct stub_local_time_device *ltdev; + struct timespec ts; + int ret; + + if (strcmp(name, LOCAL_TIME_HARDWARE_INTERFACE) != 0) + return -EINVAL; + + ltdev = calloc(1, sizeof(struct stub_local_time_device)); + if (!ltdev) + return -ENOMEM; + + ltdev->device.common.tag = HARDWARE_DEVICE_TAG; + ltdev->device.common.version = 0; + ltdev->device.common.module = (struct hw_module_t *) module; + ltdev->device.common.close = ltdev_close; + + ltdev->device.get_local_time = ltdev_get_local_time; + ltdev->device.get_local_freq = ltdev_get_local_freq; + ltdev->device.set_local_slew = NULL; + ltdev->device.get_debug_log = NULL; + + *device = <dev->device.common; + + return 0; +} + +static struct hw_module_methods_t hal_module_methods = { + .open = ltdev_open, +}; + +struct local_time_module HAL_MODULE_INFO_SYM = { + .common = { + .tag = HARDWARE_MODULE_TAG, + .version_major = 1, + .version_minor = 0, + .id = LOCAL_TIME_HARDWARE_MODULE_ID, + .name = "Default local_time HW HAL", + .author = "The Android Open Source Project", + .methods = &hal_module_methods, + }, +}; |