diff options
Diffstat (limited to 'libsensors/cm36651_proximity.c')
| -rw-r--r-- | libsensors/cm36651_proximity.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/libsensors/cm36651_proximity.c b/libsensors/cm36651_proximity.c new file mode 100644 index 0000000..23349ce --- /dev/null +++ b/libsensors/cm36651_proximity.c @@ -0,0 +1,213 @@ +/* + * Copyright (C) 2013 Paul Kocialkowski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <unistd.h> +#include <stdint.h> +#include <fcntl.h> +#include <errno.h> +#include <sys/types.h> +#include <linux/ioctl.h> +#include <linux/input.h> + +#include <hardware/sensors.h> +#include <hardware/hardware.h> + +#define LOG_TAG "exynos_sensors" +#include <utils/Log.h> + +#include "exynos_sensors.h" + +struct cm36651_proximity_data { + char path_enable[PATH_MAX]; +}; + +int cm36651_proximity_init(struct exynos_sensors_handlers *handlers, + struct exynos_sensors_device *device) +{ + struct cm36651_proximity_data *data = NULL; + char path[PATH_MAX] = { 0 }; + int input_fd = -1; + int rc; + + ALOGD("%s(%p, %p)", __func__, handlers, device); + + if (handlers == NULL) + return -EINVAL; + + data = (struct cm36651_proximity_data *) calloc(1, sizeof(struct cm36651_proximity_data)); + + input_fd = input_open("proximity_sensor"); + if (input_fd < 0) { + ALOGE("%s: Unable to open input", __func__); + goto error; + } + + rc = sysfs_path_prefix("proximity_sensor", (char *) &path); + if (rc < 0 || path[0] == '\0') { + ALOGE("%s: Unable to open sysfs", __func__); + goto error; + } + + snprintf(data->path_enable, PATH_MAX, "%s/enable", path); + + handlers->poll_fd = input_fd; + handlers->data = (void *) data; + + return 0; + +error: + if (data != NULL) + free(data); + + if (input_fd >= 0) + close(input_fd); + + handlers->poll_fd = -1; + handlers->data = NULL; + + return -1; +} + +int cm36651_proximity_deinit(struct exynos_sensors_handlers *handlers) +{ + ALOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL) + return -EINVAL; + + if (handlers->poll_fd >= 0) + close(handlers->poll_fd); + handlers->poll_fd = -1; + + if (handlers->data != NULL) + free(handlers->data); + handlers->data = NULL; + + return 0; +} + + +int cm36651_proximity_activate(struct exynos_sensors_handlers *handlers) +{ + struct cm36651_proximity_data *data; + int rc; + + ALOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL || handlers->data == NULL) + return -EINVAL; + + data = (struct cm36651_proximity_data *) handlers->data; + + rc = sysfs_value_write(data->path_enable, 1); + if (rc < 0) { + ALOGE("%s: Unable to write sysfs value", __func__); + return -1; + } + + handlers->activated = 1; + + return 0; +} + +int cm36651_proximity_deactivate(struct exynos_sensors_handlers *handlers) +{ + struct cm36651_proximity_data *data; + int rc; + + ALOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL || handlers->data == NULL) + return -EINVAL; + + data = (struct cm36651_proximity_data *) handlers->data; + + rc = sysfs_value_write(data->path_enable, 0); + if (rc < 0) { + ALOGE("%s: Unable to write sysfs value", __func__); + return -1; + } + + handlers->activated = 1; + + return 0; +} + +int cm36651_proximity_set_delay(struct exynos_sensors_handlers *handlers, long int delay) +{ + ALOGD("%s(%p, %ld)", __func__, handlers, delay); + + return 0; +} + +float cm36651_proximity_convert(int value) +{ + return (float) value * 8.0f; +} + +int cm36651_proximity_get_data(struct exynos_sensors_handlers *handlers, + struct sensors_event_t *event) +{ + struct input_event input_event; + int input_fd; + int rc; + +// ALOGD("%s(%p, %p)", __func__, handlers, event); + + if (handlers == NULL || event == NULL) + return -EINVAL; + + input_fd = handlers->poll_fd; + if (input_fd < 0) + return -EINVAL; + + event->version = sizeof(struct sensors_event_t); + event->sensor = handlers->handle; + event->type = handlers->handle; + + do { + rc = read(input_fd, &input_event, sizeof(input_event)); + if (rc < (int) sizeof(input_event)) + break; + + if (input_event.type == EV_ABS) { + if (input_event.code == ABS_DISTANCE) + event->distance = cm36651_proximity_convert(input_event.value); + } else if (input_event.type == EV_SYN) { + if (input_event.code == SYN_REPORT) + event->timestamp = input_timestamp(&input_event); + } + } while (input_event.type != EV_SYN); + + return 0; +} + +struct exynos_sensors_handlers cm36651_proximity = { + .name = "CM36651 Proximity", + .handle = SENSOR_TYPE_PROXIMITY, + .init = cm36651_proximity_init, + .deinit = cm36651_proximity_deinit, + .activate = cm36651_proximity_activate, + .deactivate = cm36651_proximity_deactivate, + .set_delay = cm36651_proximity_set_delay, + .get_data = cm36651_proximity_get_data, + .activated = 0, + .needed = 0, + .poll_fd = -1, + .data = NULL, +}; |