exynos4x12: add lights module

Change-Id: Ib37f0b7cc94a5b9607817e3b3bee4814074517a4

5 files changed, 493 insertions, 0 deletions

diff --git a/exynos4/exynos4x12/Android.mk b/exynos4/exynos4x12/Android.mk
new file mode 100644
index 0000000..5d6039f
--- /dev/null
+++ b/exynos4/exynos4x12/Android.mk
@@ -0,0 +1,20 @@
+#
+# 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.
+#
+
+ifeq ($(TARGET_SOC),exynos4x12)
+exynos4x12_dirs := liblights
+include $(call all-named-subdir-makefiles,$(exynos4x12_dirs))
+endif
diff --git a/exynos4/exynos4x12/liblights/Android.mk b/exynos4/exynos4x12/liblights/Android.mk
new file mode 100644
index 0000000..1884dc5
--- /dev/null
+++ b/exynos4/exynos4x12/liblights/Android.mk
@@ -0,0 +1,37 @@
+# Copyright (C) 2011 The Android Open Source Project
+# Copyright (C) 2011 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.
+
+LOCAL_PATH:= $(call my-dir)
+# HAL module implemenation, not prelinked and stored in
+# hw/<COPYPIX_HARDWARE_MODULE_ID>.<ro.board.platform>.so
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := lights.c
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+
+LOCAL_SHARED_LIBRARIES := liblog
+
+ifeq ($(BOARD_HAS_LED_NOTIF),true)
+     LOCAL_CFLAGS += -DLED_NOTIFICATION
+endif
+
+LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM)
+
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
+
diff --git a/exynos4/exynos4x12/liblights/NOTICE b/exynos4/exynos4x12/liblights/NOTICE
new file mode 100644
index 0000000..42b8f1c
--- /dev/null
+++ b/exynos4/exynos4x12/liblights/NOTICE
@@ -0,0 +1,192 @@
+
+   Copyright (C) 2012 The Android Open Source Project
+                      The CyanogenMod Project
+                      Daniel Hillenbrand <codeworkx@cyanogenmod.com>
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+
+   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.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
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+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
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+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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diff --git a/exynos4/exynos4x12/liblights/lights.c b/exynos4/exynos4x12/liblights/lights.c
new file mode 100644
index 0000000..b59f8ec
--- /dev/null
+++ b/exynos4/exynos4x12/liblights/lights.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *                    The CyanogenMod Project
+ *                    Daniel Hillenbrand <codeworkx@cyanogenmod.com>
+ *
+ * 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 "lights"
+#define LOG_NDEBUG 0
+
+#include <cutils/log.h>
+
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <hardware/lights.h>
+
+/******************************************************************************/
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+
+char const*const PANEL_FILE = "/sys/class/backlight/panel/brightness";
+char const*const BUTTON_FILE = "/sys/class/sec/sec_touchkey/brightness";
+
+char const*const LED_RED = "/sys/class/sec/led/led_r";
+char const*const LED_GREEN = "/sys/class/sec/led/led_g";
+char const*const LED_BLUE = "/sys/class/sec/led/led_b";
+char const*const LED_BLINK = "/sys/class/sec/led/led_blink";
+
+#define MAX_WRITE_CMD 25
+
+struct led_config {
+    int red;
+    int green;
+    int blue;
+    char blink[MAX_WRITE_CMD];
+};
+
+void init_g_lock(void)
+{
+    pthread_mutex_init(&g_lock, NULL);
+}
+
+static int write_int(char const *path, int value)
+{
+    int fd;
+    static int already_warned;
+
+    already_warned = 0;
+
+    LOGV("write_int: path %s, value %d", path, value);
+    fd = open(path, O_RDWR);
+
+    if (fd >= 0) {
+        char buffer[20];
+        int bytes = sprintf(buffer, "%d\n", value);
+        int amt = write(fd, buffer, bytes);
+        close(fd);
+        return amt == -1 ? -errno : 0;
+    } else {
+        if (already_warned == 0) {
+            LOGE("write_int failed to open %s\n", path);
+            already_warned = 1;
+        }
+        return -errno;
+    }
+}
+
+static int write_str(char const *path, const char* value)
+{
+    int fd;
+    static int already_warned;
+
+    already_warned = 0;
+
+    LOGV("write_str: path %s, value %s", path, value);
+    fd = open(path, O_RDWR);
+
+    if (fd >= 0) {
+        char buffer[MAX_WRITE_CMD];
+        int bytes = sprintf(buffer, "%s\n", value);
+        int amt = write(fd, buffer, bytes);
+        close(fd);
+        return amt == -1 ? -errno : 0;
+    } else {
+        if (already_warned == 0) {
+            LOGE("write_str failed to open %s\n", path);
+            already_warned = 1;
+        }
+        return -errno;
+    }
+}
+
+static int rgb_to_brightness(struct light_state_t const *state)
+{
+    int color = state->color & 0x00ffffff;
+
+    return ((77*((color>>16) & 0x00ff))
+        + (150*((color>>8) & 0x00ff)) + (29*(color & 0x00ff))) >> 8;
+}
+
+static int set_light_backlight(struct light_device_t *dev,
+            struct light_state_t const *state)
+{
+    int err = 0;
+    int brightness = rgb_to_brightness(state);
+
+    pthread_mutex_lock(&g_lock);
+    err = write_int(PANEL_FILE, brightness);
+    err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 2);
+    pthread_mutex_unlock(&g_lock);
+
+    return err;
+}
+
+static int close_lights(struct light_device_t *dev)
+{
+    LOGV("close_light is called");
+    if (dev)
+        free(dev);
+
+    return 0;
+}
+
+/* LEDs */
+static int write_leds(struct led_config led)
+{
+    int err = 0;
+
+    pthread_mutex_lock(&g_lock);
+    err = write_int(LED_RED, led.red);
+    err = write_int(LED_GREEN, led.green);
+    err = write_int(LED_BLUE, led.blue);
+    err = write_str(LED_BLINK, led.blink);
+    pthread_mutex_unlock(&g_lock);
+
+    return err;
+}
+
+static int set_light_leds(struct light_state_t const *state, int type)
+{
+    struct led_config led;
+    unsigned int colorRGB;
+
+    colorRGB = state->color;
+
+    switch (state->flashMode) {
+    case LIGHT_FLASH_NONE:
+            led.red = 0;
+            led.green = 0;
+            led.blue = 0;
+            snprintf(led.blink, MAX_WRITE_CMD, "0x00 0 0");
+        break;
+    case LIGHT_FLASH_TIMED:
+    case LIGHT_FLASH_HARDWARE:
+            led.red = (colorRGB >> 16) & 0xFF;
+            led.green = (colorRGB >> 8) & 0xFF;
+            led.blue = colorRGB & 0xFF;
+            snprintf(led.blink, MAX_WRITE_CMD, "0xFF 80 2000");
+        break;
+    default:
+        return -EINVAL;
+    }
+
+    return write_leds(led);
+}
+
+static int set_light_leds_notifications(struct light_device_t *dev,
+            struct light_state_t const *state)
+{
+    return set_light_leds(state, 0);
+}
+
+static int set_light_leds_attention(struct light_device_t *dev,
+            struct light_state_t const *state)
+{
+    return set_light_leds(state, 1);
+}
+
+static int open_lights(const struct hw_module_t *module, char const *name,
+                        struct hw_device_t **device)
+{
+    int (*set_light)(struct light_device_t *dev,
+        struct light_state_t const *state);
+
+    if (0 == strcmp(LIGHT_ID_BACKLIGHT, name))
+        set_light = set_light_backlight;
+    else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
+        set_light = set_light_leds_notifications;
+    else if (0 == strcmp(LIGHT_ID_ATTENTION, name))
+        set_light = set_light_leds_attention;
+    else
+        return -EINVAL;
+
+    pthread_once(&g_init, init_g_lock);
+
+    struct light_device_t *dev = malloc(sizeof(struct light_device_t));
+    memset(dev, 0, sizeof(*dev));
+
+    dev->common.tag = HARDWARE_DEVICE_TAG;
+    dev->common.version = 0;
+    dev->common.module = (struct hw_module_t *)module;
+    dev->common.close = (int (*)(struct hw_device_t *))close_lights;
+    dev->set_light = set_light;
+
+    *device = (struct hw_device_t *)dev;
+
+    return 0;
+}
+
+static struct hw_module_methods_t lights_module_methods = {
+    .open =  open_lights,
+};
+
+const struct hw_module_t HAL_MODULE_INFO_SYM = {
+    .tag = HARDWARE_MODULE_TAG,
+    .version_major = 1,
+    .version_minor = 0,
+    .id = LIGHTS_HARDWARE_MODULE_ID,
+    .name = "Exynos4x12 lights Module",
+    .author = "The CyanogenMod Project",
+    .methods = &lights_module_methods,
+};
diff --git a/exynos4x12.mk b/exynos4x12.mk
index 29cc4d5..ae761c4 100644
--- a/exynos4x12.mk
+++ b/exynos4x12.mk
@@ -17,6 +17,7 @@ ifeq ($(TARGET_SOC),exynos4x12)
 
 include $(TARGET_HAL_PATH)/Android.mk
 include hardware/samsung/exynos/multimedia/Android.mk
+include hardware/samsung/exynos4/exynos4x12/Android.mk
 
 endif
 endif