crespo: Add and enable Power HAL

This is a squash of the following commits:

crespo: Add Power HAL (for userspace CPU boosting)

The majority of this commit is by Steve Kondik for the D2,
modified by Daniel Bateman and Pawit Pornkitprasan for aries,
and Justin White for crespo.

crespo: Build power HAL

Add support bits for power HAL to be built.

From patch http://review.cyanogenmod.com/#/c/23867/

Power HAL: Remove sampling rate change

Sampling rate change causes stutter while playing music.
Stutter appears randomly, but has a higher chance of appearing
when the screen goes from off to on.

Change-Id: Ic0f6aa3c36adc26322a1359068797eac10387e9c

3 files changed, 156 insertions, 1 deletions

diff --git a/device_base.mk b/device_base.mk
index e667658..a070b4d 100644
--- a/device_base.mk
+++ b/device_base.mk
@@ -140,7 +140,8 @@ PRODUCT_PACKAGES += \
 PRODUCT_PACKAGES += \
 	lights.s5pc110 \
 	hwcomposer.s5pc110 \
-	sensors.herring
+	sensors.herring \
+    power.s5pc110
 
 # Torch
 PRODUCT_PACKAGES += \
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,
+};