shamu: add power hal.

Turn on "double tap" wake up gesture when interactive mode is off.
Chown /sys/bus/i2c/devices/1-004a/tsp to "system"

Bug: 16960142
Change-Id: Ie6eb2b269864044a05241ead62b89c2063caadaa

2 files changed, 117 insertions, 0 deletions

diff --git a/power/Android.mk b/power/Android.mk
new file mode 100644
index 00000000..96c98b83
--- /dev/null
+++ b/power/Android.mk
@@ -0,0 +1,25 @@
+#
+# Copyright 2014 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)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_SRC_FILES := power_shamu.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE := power.shamu
+include $(BUILD_SHARED_LIBRARY)
diff --git a/power/power_shamu.c b/power/power_shamu.c
new file mode 100644
index 00000000..63da2ece
--- /dev/null
+++ b/power/power_shamu.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#define LOG_TAG "PowerHAL"
+#include <utils/Log.h>
+
+#include <hardware/hardware.h>
+#include <hardware/power.h>
+
+#define TOUCH_INTERACTIVE_PATH "/sys/bus/i2c/devices/1-004a/tsp"
+
+static int sysfs_write(const char *path, char *s)
+{
+    char buf[80];
+    int len;
+    int fd = open(path, O_WRONLY);
+
+    if (fd < 0) {
+        strerror_r(errno, buf, sizeof(buf));
+        ALOGE("Error opening %s: %s\n", path, buf);
+        return -1;
+    }
+
+    len = write(fd, s, strlen(s));
+    if (len < 0) {
+        strerror_r(errno, buf, sizeof(buf));
+        ALOGE("Error writing to %s: %s\n", path, buf);
+        close(fd);
+        return -1;
+    }
+
+    close(fd);
+    return 0;
+}
+
+static void power_init(__attribute__((unused)) struct power_module *module)
+{
+    ALOGI("%s", __func__);
+}
+
+static void power_set_interactive(__attribute__((unused)) struct power_module *module, int on)
+{
+    ALOGV("%s %s", __func__, (on ? "ON" : "OFF"));
+    sysfs_write(TOUCH_INTERACTIVE_PATH, on ? "AUTO" : "ON");
+}
+
+static void power_hint( __attribute__((unused)) struct power_module *module,
+                        __attribute__((unused)) power_hint_t hint,
+                        __attribute__((unused)) void *data)
+{
+}
+
+static struct hw_module_methods_t power_module_methods = {
+    .open = NULL,
+};
+
+struct power_module HAL_MODULE_INFO_SYM = {
+    .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 = "Shamu Power HAL",
+        .author = "The Android Open Source Project",
+        .methods = &power_module_methods,
+    },
+
+    .init = power_init,
+    .setInteractive = power_set_interactive,
+    .powerHint = power_hint,
+};