2 files changed, 143 insertions, 0 deletions
diff --git a/modules/local_time/Android.mk b/modules/local_time/Android.mk
new file mode 100644
index 0000000..f840dc7
--- /dev/null
+++ b/modules/local_time/Android.mk
@@ -0,0 +1,34 @@
+# 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.
+
+LOCAL_PATH := $(call my-dir)
+
+# The default local time HAL module.  The default module simply uses the
+# system's clock_gettime(CLOCK_MONOTONIC) and does not support HW slewing.
+# Devices which use the default implementation should take care to ensure that
+# the oscillator backing the CLOCK_MONOTONIC implementation is phase locked to
+# the audio and video output hardware.  This default implementation is loaded
+# if no other device specific modules are present. The exact load order can be
+# seen in libhardware/hardware.c
+#
+# The format of the name is local_time.<hardware>.so
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := local_time.default
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SRC_FILES := local_time_hw.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
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 = &ltdev->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,
+    },
+};