From 0c2e6b3feb59560333e7d4e0b1ff24e83c26ccb4 Mon Sep 17 00:00:00 2001 From: Paul Kocialkowski Date: Mon, 25 Feb 2013 19:40:48 +0100 Subject: Piranha Sensors module and geomagneticd Signed-off-by: Paul Kocialkowski --- sensors/gp2a_proximity.c | 224 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 sensors/gp2a_proximity.c (limited to 'sensors/gp2a_proximity.c') diff --git a/sensors/gp2a_proximity.c b/sensors/gp2a_proximity.c new file mode 100644 index 0000000..65dd4d7 --- /dev/null +++ b/sensors/gp2a_proximity.c @@ -0,0 +1,224 @@ +/* + * 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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define LOG_TAG "piranha_sensors" +#include + +#include "piranha_sensors.h" + +struct gp2a_proximity_data { + char path_enable[PATH_MAX]; +}; + +int gp2a_proximity_init(struct piranha_sensors_handlers *handlers, struct piranha_sensors_device *device) +{ + struct gp2a_proximity_data *data = NULL; + char path[PATH_MAX] = { 0 }; + int input_fd = -1; + int rc; + + LOGD("%s(%p, %p)", __func__, handlers, device); + + if (handlers == NULL) + return -EINVAL; + + input_fd = input_open("proximity_sensor"); + if (input_fd < 0) { + LOGE("%s: Unable to open input", __func__); + goto error; + } + + rc = sysfs_path_prefix("proximity_sensor", (char *) &path); + if (rc < 0 || path[0] == '\0') { + LOGE("%s: Unable to open sysfs", __func__); + goto error; + } + + data = (struct gp2a_proximity_data *) calloc(1, sizeof(struct gp2a_proximity_data)); + + snprintf(data->path_enable, PATH_MAX, "%s/enable", path); + + handlers->poll_fd = input_fd; + handlers->data = (void *) data; + + return 0; + +error: + if (input_fd >= 0) + close(input_fd); + + if (data != NULL) + free(data); + + handlers->poll_fd = -1; + handlers->data = NULL; + + return -1; +} + +int gp2a_proximity_deinit(struct piranha_sensors_handlers *handlers) +{ + int input_fd; + + LOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL) + return -EINVAL; + + input_fd = handlers->poll_fd; + if (input_fd >= 0) + close(input_fd); + + handlers->poll_fd = -1; + + if (handlers->data != NULL) + free(handlers->data); + + handlers->data = NULL; + + return 0; +} + +int gp2a_proximity_activate(struct piranha_sensors_handlers *handlers) +{ + struct gp2a_proximity_data *data; + char enable[] = "1\n"; + int fd; + + LOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL || handlers->data == NULL) + return -EINVAL; + + data = (struct gp2a_proximity_data *) handlers->data; + + fd = open(data->path_enable, O_WRONLY); + if (fd < 0) { + LOGE("%s: Unable to open enable path", __func__); + return -1; + } + + write(fd, &enable, sizeof(enable)); + close(fd); + + handlers->activated = 1; + + return 0; +} + +int gp2a_proximity_deactivate(struct piranha_sensors_handlers *handlers) +{ + struct gp2a_proximity_data *data; + char enable[] = "0\n"; + int fd; + + LOGD("%s(%p)", __func__, handlers); + + if (handlers == NULL || handlers->data == NULL) + return -EINVAL; + + data = (struct gp2a_proximity_data *) handlers->data; + + fd = open(data->path_enable, O_WRONLY); + if (fd < 0) { + LOGE("%s: Unable to open enable path", __func__); + return -1; + } + + write(fd, &enable, sizeof(enable)); + close(fd); + + handlers->activated = 0; + + return 0; +} + +int gp2a_proximity_set_delay(struct piranha_sensors_handlers *handlers, int64_t delay) +{ + struct gp2a_proximity_data *data; + char *value = NULL; + int c; + int fd; + +// LOGD("%s(%p, %ld)", __func__, handlers, (long int) delay); + + if (handlers == NULL || handlers->data == NULL) + return -EINVAL; + + return 0; +} + +float gp2a_proximity_proximity(int value) +{ + return (float) value * 5.0f; +} + +int gp2a_proximity_get_data(struct piranha_sensors_handlers *handlers, + struct sensors_event_t *event) +{ + struct input_event input_event; + int input_fd; + int rc; + + if (handlers == NULL || event == NULL) + return -EINVAL; + + input_fd = handlers->poll_fd; + if (input_fd < 0) + return -EINVAL; + + rc = read(input_fd, &input_event, sizeof(input_event)); + if (rc < (int) sizeof(input_event)) + return -EINVAL; + + if (input_event.type != EV_ABS || input_event.code != ABS_DISTANCE) + return -1; + + event->version = sizeof(struct sensors_event_t); + event->sensor = handlers->handle; + event->type = handlers->handle; + event->timestamp = input_timestamp(&input_event); + event->distance = gp2a_proximity_proximity(input_event.value); + + return 0; +} + +struct piranha_sensors_handlers gp2a_proximity = { + .name = "GP2A Proximity", + .handle = SENSOR_TYPE_PROXIMITY, + .init = gp2a_proximity_init, + .deinit = gp2a_proximity_deinit, + .activate = gp2a_proximity_activate, + .deactivate = gp2a_proximity_deactivate, + .set_delay = gp2a_proximity_set_delay, + .get_data = gp2a_proximity_get_data, + .activated = 0, + .poll_fd = -1, + .data = NULL, +}; -- cgit v1.1