diff options
Diffstat (limited to 'power')
| -rw-r--r-- | power/Android.mk | 27 | ||||
| -rw-r--r-- | power/power.c | 127 |
2 files changed, 154 insertions, 0 deletions
diff --git a/power/Android.mk b/power/Android.mk new file mode 100644 index 0000000..fcbb721 --- /dev/null +++ b/power/Android.mk @@ -0,0 +1,27 @@ +# Copyright (C) 2012 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) + +# HAL module implemenation stored in +# hw/<POWERS_HARDWARE_MODULE_ID>.<ro.hardware>.so +include $(CLEAR_VARS) + +LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw +LOCAL_SHARED_LIBRARIES := liblog libcutils +LOCAL_SRC_FILES := power.c +LOCAL_MODULE := power.$(TARGET_BOARD_PLATFORM) +LOCAL_MODULE_TAGS := optional +include $(BUILD_SHARED_LIBRARY) diff --git a/power/power.c b/power/power.c new file mode 100644 index 0000000..78a9f1e --- /dev/null +++ b/power/power.c @@ -0,0 +1,127 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * Copyright (C) 2012 The CyanogenMod 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. + */ +#include <errno.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define LOG_TAG "PowerHAL" +#include <cutils/properties.h> +#include <utils/Log.h> + +#include <hardware/hardware.h> +#include <hardware/power.h> + +#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpufreq/ondemand/boostpulse" + +struct s5pc110_power_module { + struct power_module base; + pthread_mutex_t lock; + int boostpulse_fd; + int boostpulse_warned; +}; + +static int boostpulse_open(struct s5pc110_power_module *s5pc110) +{ + char buf[80]; + + pthread_mutex_lock(&s5pc110->lock); + + if (s5pc110->boostpulse_fd < 0) { + s5pc110->boostpulse_fd = open(BOOSTPULSE_PATH, O_WRONLY); + + if (s5pc110->boostpulse_fd < 0) { + if (!s5pc110->boostpulse_warned) { + strerror_r(errno, buf, sizeof(buf)); + ALOGE("Error opening %s: %s\n", BOOSTPULSE_PATH, buf); + s5pc110->boostpulse_warned = 1; + } + } + } + + pthread_mutex_unlock(&s5pc110->lock); + return s5pc110->boostpulse_fd; +} + +static void s5pc110_power_hint(struct power_module *module, power_hint_t hint, + void *data) +{ + struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module; + char buf[80]; + int len; + int duration = 1; + + switch (hint) { + case POWER_HINT_INTERACTION: + case POWER_HINT_CPU_BOOST: + if (boostpulse_open(s5pc110) >= 0) { + if (data != NULL) + duration = (int) data; + + snprintf(buf, sizeof(buf), "%d", duration); + len = write(s5pc110->boostpulse_fd, buf, strlen(buf)); + + if (len < 0) { + strerror_r(errno, buf, sizeof(buf)); + ALOGE("Error writing to %s: %s\n", BOOSTPULSE_PATH, buf); + } + } + break; + + case POWER_HINT_VSYNC: + break; + + default: + break; + } +} + +static void s5pc110_power_set_interactive(struct power_module *module, int on) +{ + return; +} + +static void s5pc110_power_init(struct power_module *module) +{ + return; +} + +static struct hw_module_methods_t power_module_methods = { + .open = NULL, +}; + +struct s5pc110_power_module HAL_MODULE_INFO_SYM = { + base: { + common: { + tag: HARDWARE_MODULE_TAG, + module_api_version: POWER_MODULE_API_VERSION_0_2, + hal_api_version: HARDWARE_HAL_API_VERSION, + id: POWER_HARDWARE_MODULE_ID, + name: "S5PC110 Power HAL", + author: "The Android Open Source Project", + methods: &power_module_methods, + }, + init: s5pc110_power_init, + setInteractive: s5pc110_power_set_interactive, + powerHint: s5pc110_power_hint, + }, + + lock: PTHREAD_MUTEX_INITIALIZER, + boostpulse_fd: -1, + boostpulse_warned: 0, +}; |