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Initial unified Samsung lights HAL

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Originally written by Andreas Schneider for Slte.

Change-Id: Iccff1e4532bc460896940451093470ece9086fb9
tirimbino
Christopher N. Hesse 9 years ago
parent 87a5957b93
commit 79a9b15147
4 changed files with 559 additions and 0 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 1
      Android.mk
  2. 29
      liblights/Android.mk
  3. 190
      liblights/NOTICE
  4. 339
      liblights/lights.c

1
Android.mk
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@ -36,6 +36,7 @@ include $(SAM_ROOT)/wifiloader/Android.mk
endif endif
ifeq ($(BOARD_VENDOR),samsung) ifeq ($(BOARD_VENDOR),samsung)
include $(SAM_ROOT)/liblights/Android.mk
include $(SAM_ROOT)/modemloader/Android.mk include $(SAM_ROOT)/modemloader/Android.mk
include $(SAM_ROOT)/power/Android.mk include $(SAM_ROOT)/power/Android.mk
include $(SAM_ROOT)/ril/Android.mk include $(SAM_ROOT)/ril/Android.mk

29
liblights/Android.mk
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@ -0,0 +1,29 @@
# Copyright (C) 2015 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:= $(call my-dir)
ifneq ($(TARGET_PROVIDES_LIBLIGHT),true)
include $(CLEAR_VARS)
LOCAL_MODULE := lights.$(TARGET_BOOTLOADER_BOARD_NAME)
LOCAL_MODULE_RELATIVE_PATH := hw
LOCAL_SHARED_LIBRARIES := liblog
LOCAL_SRC_FILES := lights.c
LOCAL_MODULE_TAGS := optional
include $(BUILD_SHARED_LIBRARY)
endif

190
liblights/NOTICE
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@ -0,0 +1,190 @@
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.
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
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http://www.apache.org/licenses/
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339
liblights/lights.c
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@ -0,0 +1,339 @@
/*
* Copyright (C) 2013 The Android Open Source Project
* Copyright (C) 2015 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.
*/
#define LOG_TAG "SamsungLightsHAL"
/* #define LOG_NDEBUG 0 */
#include <cutils/log.h>
#include <stdlib.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>
#define PANEL_FILE "/sys/class/backlight/panel/brightness"
#define BUTTON_FILE "/sys/class/sec/sec_touchkey/brightness"
#define LED_BLINK "/sys/class/sec/led/led_blink"
#define COLOR_MASK 0x00ffffff
static pthread_once_t g_init = PTHREAD_ONCE_INIT;
static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
struct led_config {
unsigned int color;
int delay_on, delay_off;
};
static struct led_config g_leds[3]; // For battery, notifications, and attention.
static int g_cur_led = -1; // Presently showing LED of the above.
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;
ALOGV("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) {
ALOGE("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;
ALOGV("write_str: path %s, value %s", path, value);
fd = open(path, O_RDWR);
if (fd >= 0) {
int amt = write(fd, value, strlen(value));
close(fd);
return amt == -1 ? -errno : 0;
} else {
if (already_warned == 0) {
ALOGE("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 & COLOR_MASK;
return ((77*((color>>16) & 0x00ff))
+ (150*((color>>8) & 0x00ff)) + (29*(color & 0x00ff))) >> 8;
}
static int set_light_backlight(struct light_device_t *dev __unused,
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);
pthread_mutex_unlock(&g_lock);
return err;
}
static int set_light_buttons(struct light_device_t* dev __unused,
struct light_state_t const* state)
{
int err = 0;
int on = (state->color & COLOR_MASK);
pthread_mutex_lock(&g_lock);
err = write_int(BUTTON_FILE, on ? 1 : 0);
pthread_mutex_unlock(&g_lock);
return err;
}
static int close_lights(struct light_device_t *dev)
{
ALOGV("close_light is called");
if (dev)
free(dev);
return 0;
}
/* LEDs */
static int write_leds(const struct led_config *led)
{
static const struct led_config led_off = {0, 0, 0};
char blink[32];
int count, err;
int color;
if (led == NULL)
led = &led_off;
count = snprintf(blink,
sizeof(blink) - 1,
"0x%08x %d %d",
led->color,
led->delay_on,
led->delay_off);
if (count < 0) {
return -errno;
} else if ((unsigned int)count >= sizeof(blink)-1) {
ALOGE("%s: Truncated string: blink=\"%s\".", __func__, blink);
return -EINVAL;
}
ALOGV("%s: color=0x%08x, delay_on=%d, delay_off=%d, blink=\"%s\".",
__func__, led->color, led->delay_on, led->delay_off, blink);
/* Add '\n' here to make the above log message clean. */
blink[count] = '\n';
blink[count+1] = '\0';
pthread_mutex_lock(&g_lock);
err = write_str(LED_BLINK, 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;
int err = 0;
ALOGV("%s: type=%d, color=0x%010x, fM=%d, fOnMS=%d, fOffMs=%d.", __func__,
type, state->color,state->flashMode, state->flashOnMS, state->flashOffMS);
if (type < 0 || (size_t)type >= sizeof(g_leds)/sizeof(g_leds[0])) {
return -EINVAL;
}
/* type is one of:
* 0. battery
* 1. notifications
* 2. attention
* which are multiplexed onto the same physical LED in the above order. */
led = &g_leds[type];
switch (state->flashMode) {
case LIGHT_FLASH_NONE:
/* Set LED to a solid color, spec is unclear on the exact behavior here. */
led->delay_on = led->delay_off = 0;
break;
case LIGHT_FLASH_TIMED:
case LIGHT_FLASH_HARDWARE:
led->delay_on = state->flashOnMS;
led->delay_off = state->flashOffMS;
break;
default:
return -EINVAL;
}
led->color = state->color & COLOR_MASK;
if (led->color > 0) {
/* This LED is lit. */
if (type >= g_cur_led) {
/* And it has the highest priority, so show it. */
err = write_leds(led);
g_cur_led = type;
}
} else {
/* This LED is not (any longer) lit. */
if (type == g_cur_led) {
/* But it is currently showing, switch to a lower-priority LED. */
int i;
for (i = type-1; i >= 0; i--) {
if (g_leds[i].color > 0) {
/* Found a lower-priority LED to switch to. */
err = write_leds(&g_leds[i]);
goto switched;
}
}
/* No LEDs are lit, turn off. */
err = write_leds(NULL);
switched:
g_cur_led = i;
}
}
return err;
}
static int set_light_leds_battery(struct light_device_t *dev __unused,
struct light_state_t const *state)
{
return set_light_leds(state, 0);
}
static int set_light_leds_notifications(struct light_device_t *dev __unused,
struct light_state_t const *state)
{
return set_light_leds(state, 1);
}
static int set_light_leds_attention(struct light_device_t *dev __unused,
struct light_state_t const *state)
{
struct light_state_t fixed;
memcpy(&fixed, state, sizeof(fixed));
/* The framework does odd things with the attention lights, fix them up to
* do something sensible here. */
switch (fixed.flashMode) {
case LIGHT_FLASH_NONE:
/* LightsService.Light::stopFlashing calls with non-zero color. */
fixed.color = 0;
break;
case LIGHT_FLASH_HARDWARE:
/* PowerManagerService::setAttentionLight calls with onMS=3, offMS=0, which
* just makes for a slightly-dimmer LED. */
if (fixed.flashOnMS > 0 && fixed.flashOffMS == 0)
fixed.flashMode = LIGHT_FLASH_NONE;
fixed.color = 0x000000ff;
break;
}
return set_light_leds(&fixed, 2);
}
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_BUTTONS, name))
set_light = set_light_buttons;
else if (0 == strcmp(LIGHT_ID_BATTERY, name))
set_light = set_light_leds_battery;
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,
};
struct hw_module_t HAL_MODULE_INFO_SYM = {
.tag = HARDWARE_MODULE_TAG,
.version_major = 1,
.version_minor = 0,
.id = LIGHTS_HARDWARE_MODULE_ID,
.name = "Samsung Lights Module",
.author = "The CyanogenMod Project",
.methods = &lights_module_methods,
};
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