diff options
Diffstat (limited to 'src/udev/accelerometer/accelerometer.c')
-rw-r--r-- | src/udev/accelerometer/accelerometer.c | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/src/udev/accelerometer/accelerometer.c b/src/udev/accelerometer/accelerometer.c deleted file mode 100644 index 67fed27c5e..0000000000 --- a/src/udev/accelerometer/accelerometer.c +++ /dev/null @@ -1,358 +0,0 @@ -/* - * accelerometer - exports device orientation through property - * - * When an "change" event is received on an accelerometer, - * open its device node, and from the value, as well as the previous - * value of the property, calculate the device's new orientation, - * and export it as ID_INPUT_ACCELEROMETER_ORIENTATION. - * - * Possible values are: - * undefined - * * normal - * * bottom-up - * * left-up - * * right-up - * - * The property will be persistent across sessions, and the new - * orientations can be deducted from the previous one (it allows - * for a threshold for switching between opposite ends of the - * orientation). - * - * Copyright (C) 2011 Red Hat, Inc. - * Author: - * Bastien Nocera <hadess@hadess.net> - * - * orientation_calc() from the sensorfw package - * Copyright (C) 2009-2010 Nokia Corporation - * Authors: - * Üstün Ergenoglu <ext-ustun.ergenoglu@nokia.com> - * Timo Rongas <ext-timo.2.rongas@nokia.com> - * Lihan Guo <lihan.guo@digia.com> - * - * 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 2 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 keymap; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ - -#include <stdio.h> -#include <string.h> -#include <math.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> -#include <limits.h> -#include <linux/limits.h> -#include <linux/input.h> - -#include "libudev.h" -#include "libudev-private.h" - -/* we must use this kernel-compatible implementation */ -#define BITS_PER_LONG (sizeof(unsigned long) * 8) -#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1) -#define OFF(x) ((x)%BITS_PER_LONG) -#define BIT(x) (1UL<<OFF(x)) -#define LONG(x) ((x)/BITS_PER_LONG) -#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1) - -static int debug = 0; - -static void log_fn(struct udev *udev, int priority, - const char *file, int line, const char *fn, - const char *format, va_list args) -{ - if (debug) { - fprintf(stderr, "%s: ", fn); - vfprintf(stderr, format, args); - } else { - vsyslog(priority, format, args); - } -} - -typedef enum { - ORIENTATION_UNDEFINED, - ORIENTATION_NORMAL, - ORIENTATION_BOTTOM_UP, - ORIENTATION_LEFT_UP, - ORIENTATION_RIGHT_UP -} OrientationUp; - -static const char *orientations[] = { - "undefined", - "normal", - "bottom-up", - "left-up", - "right-up", - NULL -}; - -#define ORIENTATION_UP_UP ORIENTATION_NORMAL - -#define DEFAULT_THRESHOLD 250 -#define RADIANS_TO_DEGREES 180.0/M_PI -#define SAME_AXIS_LIMIT 5 - -#define THRESHOLD_LANDSCAPE 25 -#define THRESHOLD_PORTRAIT 20 - -static const char * -orientation_to_string (OrientationUp o) -{ - return orientations[o]; -} - -static OrientationUp -string_to_orientation (const char *orientation) -{ - int i; - - if (orientation == NULL) - return ORIENTATION_UNDEFINED; - for (i = 0; orientations[i] != NULL; i++) { - if (strcmp (orientation, orientations[i]) == 0) - return i; - } - return ORIENTATION_UNDEFINED; -} - -static OrientationUp -orientation_calc (OrientationUp prev, - int x, int y, int z) -{ - int rotation; - OrientationUp ret = prev; - - /* Portrait check */ - rotation = round(atan((double) x / sqrt(y * y + z * z)) * RADIANS_TO_DEGREES); - - if (abs(rotation) > THRESHOLD_PORTRAIT) { - ret = (rotation < 0) ? ORIENTATION_LEFT_UP : ORIENTATION_RIGHT_UP; - - /* Some threshold to switching between portrait modes */ - if (prev == ORIENTATION_LEFT_UP || prev == ORIENTATION_RIGHT_UP) { - if (abs(rotation) < SAME_AXIS_LIMIT) { - ret = prev; - } - } - - } else { - /* Landscape check */ - rotation = round(atan((double) y / sqrt(x * x + z * z)) * RADIANS_TO_DEGREES); - - if (abs(rotation) > THRESHOLD_LANDSCAPE) { - ret = (rotation < 0) ? ORIENTATION_BOTTOM_UP : ORIENTATION_NORMAL; - - /* Some threshold to switching between landscape modes */ - if (prev == ORIENTATION_BOTTOM_UP || prev == ORIENTATION_NORMAL) { - if (abs(rotation) < SAME_AXIS_LIMIT) { - ret = prev; - } - } - } - } - - return ret; -} - -static OrientationUp -get_prev_orientation(struct udev_device *dev) -{ - const char *value; - - value = udev_device_get_property_value(dev, "ID_INPUT_ACCELEROMETER_ORIENTATION"); - if (value == NULL) - return ORIENTATION_UNDEFINED; - return string_to_orientation(value); -} - -#define SET_AXIS(axis, code_) if (ev[i].code == code_) { if (got_##axis == 0) { axis = ev[i].value; got_##axis = 1; } } - -/* accelerometers */ -static void test_orientation(struct udev *udev, - struct udev_device *dev, - const char *devpath) -{ - OrientationUp old, new; - int fd, r; - struct input_event ev[64]; - int got_syn = 0; - int got_x, got_y, got_z; - int x = 0, y = 0, z = 0; - char text[64]; - - old = get_prev_orientation(dev); - - if ((fd = open(devpath, O_RDONLY)) < 0) - return; - - got_x = got_y = got_z = 0; - - while (1) { - int i; - - r = read(fd, ev, sizeof(struct input_event) * 64); - - if (r < (int) sizeof(struct input_event)) { - close(fd); - return; - } - - for (i = 0; i < r / (int) sizeof(struct input_event); i++) { - if (got_syn == 1) { - if (ev[i].type == EV_ABS) { - SET_AXIS(x, ABS_X); - SET_AXIS(y, ABS_Y); - SET_AXIS(z, ABS_Z); - } - } - if (ev[i].type == EV_SYN && ev[i].code == SYN_REPORT) { - got_syn = 1; - } - if (got_x && got_y && got_z) - goto read_dev; - } - } - -read_dev: - close(fd); - - if (!got_x || !got_y || !got_z) - return; - - new = orientation_calc(old, x, y, z); - snprintf(text, sizeof(text), "ID_INPUT_ACCELEROMETER_ORIENTATION=%s", orientation_to_string(new)); - puts(text); -} - -static void help(void) -{ - printf("Usage: accelerometer [options] <device path>\n" - " --debug debug to stderr\n" - " --help print this help text\n\n"); -} - -int main (int argc, char** argv) -{ - struct udev *udev; - struct udev_device *dev; - - static const struct option options[] = { - { "debug", no_argument, NULL, 'd' }, - { "help", no_argument, NULL, 'h' }, - {} - }; - - char devpath[PATH_MAX]; - char *devnode; - const char *id_path; - struct udev_enumerate *enumerate; - struct udev_list_entry *list_entry; - - udev = udev_new(); - if (udev == NULL) - return 1; - - log_open(); - udev_set_log_fn(udev, log_fn); - - /* CLI argument parsing */ - while (1) { - int option; - - option = getopt_long(argc, argv, "dxh", options, NULL); - if (option == -1) - break; - - switch (option) { - case 'd': - debug = 1; - log_set_max_level(LOG_DEBUG); - udev_set_log_priority(udev, LOG_DEBUG); - break; - case 'h': - help(); - exit(0); - default: - exit(1); - } - } - - if (argv[optind] == NULL) { - help(); - exit(1); - } - - /* get the device */ - snprintf(devpath, sizeof(devpath), "/sys/%s", argv[optind]); - dev = udev_device_new_from_syspath(udev, devpath); - if (dev == NULL) { - fprintf(stderr, "unable to access '%s'\n", devpath); - return 1; - } - - id_path = udev_device_get_property_value(dev, "ID_PATH"); - if (id_path == NULL) { - fprintf (stderr, "unable to get property ID_PATH for '%s'", devpath); - return 0; - } - - /* Get the children devices and find the devnode */ - /* FIXME: use udev_enumerate_add_match_parent() instead */ - devnode = NULL; - enumerate = udev_enumerate_new(udev); - udev_enumerate_add_match_property(enumerate, "ID_PATH", id_path); - udev_enumerate_add_match_subsystem(enumerate, "input"); - udev_enumerate_scan_devices(enumerate); - udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { - struct udev_device *device; - const char *node; - - device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), - udev_list_entry_get_name(list_entry)); - if (device == NULL) - continue; - /* Already found it */ - if (devnode != NULL) { - udev_device_unref(device); - continue; - } - - node = udev_device_get_devnode(device); - if (node == NULL) { - udev_device_unref(device); - continue; - } - /* Use the event sub-device */ - if (strstr(node, "/event") == NULL) { - udev_device_unref(device); - continue; - } - - devnode = strdup(node); - udev_device_unref(device); - } - - if (devnode == NULL) { - fprintf(stderr, "unable to get device node for '%s'\n", devpath); - return 0; - } - - log_debug("opening accelerometer device %s\n", devnode); - test_orientation(udev, dev, devnode); - free(devnode); - log_close(); - return 0; -} |