minuitwrp/events.c - android_bootable_recovery - Gitiles

 /*
  * Copyright (C) 2007 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.
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
 #include <dirent.h>
 #include <sys/poll.h>
 #include <limits.h>

 #include <linux/input.h>

 #include "../common.h"

 #include "minui.h"

 //#define _EVENT_LOGGING

 #define MAX_DEVICES         16

 #define VIBRATOR_TIMEOUT_FILE	"/sys/class/timed_output/vibrator/enable"
 #define VIBRATOR_TIME_MS    50

 #ifndef SYN_REPORT
 #define SYN_REPORT          0x00
 #endif
 #ifndef SYN_CONFIG
 #define SYN_CONFIG          0x01
 #endif
 #ifndef SYN_MT_REPORT
 #define SYN_MT_REPORT       0x02
 #endif

 #define ABS_MT_POSITION     0x2a /* Group a set of X and Y */
 #define ABS_MT_AMPLITUDE    0x2b /* Group a set of Z and W */
 #define ABS_MT_SLOT         0x2f
 #define ABS_MT_TOUCH_MAJOR  0x30
 #define ABS_MT_TOUCH_MINOR  0x31
 #define ABS_MT_WIDTH_MAJOR  0x32
 #define ABS_MT_WIDTH_MINOR  0x33
 #define ABS_MT_ORIENTATION  0x34
 #define ABS_MT_POSITION_X   0x35
 #define ABS_MT_POSITION_Y   0x36
 #define ABS_MT_TOOL_TYPE    0x37
 #define ABS_MT_BLOB_ID      0x38
 #define ABS_MT_TRACKING_ID  0x39
 #define ABS_MT_PRESSURE     0x3a
 #define ABS_MT_DISTANCE     0x3b

 enum {
     DOWN_NOT,
     DOWN_SENT,
     DOWN_RELEASED,
 };

 struct virtualkey {
     int scancode;
     int centerx, centery;
     int width, height;
 };

 struct position {
     int x, y;
     int synced;
     struct input_absinfo xi, yi;
 };

 struct ev {
     struct pollfd *fd;

     struct virtualkey *vks;
     int vk_count;

     char deviceName[64];

     int ignored;

     struct position p, mt_p;
     int down;
 };

 static struct pollfd ev_fds[MAX_DEVICES];
 static struct ev evs[MAX_DEVICES];
 static unsigned ev_count = 0;

 static inline int ABS(int x) {
     return x<0?-x:x;
 }

 int vibrate(int timeout_ms)
 {
     char str[20];
     int fd;
     int ret;

     fd = open(VIBRATOR_TIMEOUT_FILE, O_WRONLY);
     if (fd < 0)
         return -1;

     ret = snprintf(str, sizeof(str), "%d", timeout_ms);
     ret = write(fd, str, ret);
     close(fd);

     if (ret < 0)
        return -1;

     return 0;
 }

 /* Returns empty tokens */
 static char *vk_strtok_r(char *str, const char *delim, char **save_str)
 {
     if(!str)
     {
         if(!*save_str)
             return NULL;

         str = (*save_str) + 1;
     }
     *save_str = strpbrk(str, delim);

     if (*save_str)
         **save_str = '\0';

     return str;
 }

 static int vk_init(struct ev *e)
 {
     char vk_path[PATH_MAX] = "/sys/board_properties/virtualkeys.";
     char vks[2048], *ts = NULL;
     ssize_t len;
     int vk_fd;
     int i;

     e->vk_count = 0;

     len = strlen(vk_path);
     len = ioctl(e->fd->fd, EVIOCGNAME(sizeof(e->deviceName)), e->deviceName);
     if (len <= 0)
     {
         printf("Unable to query event object.\n");
         return -1;
     }
 #ifdef _EVENT_LOGGING
     printf("Event object: %s\n", e->deviceName);
 #endif

     // Blacklist these "input" devices
     if (strcmp(e->deviceName, "bma250") == 0 || strcmp(e->deviceName, "bma150") == 0)
     {
         e->ignored = 1;
     }

     strcat(vk_path, e->deviceName);

     // Some devices split the keys from the touchscreen
     e->vk_count = 0;
     vk_fd = open(vk_path, O_RDONLY);
     if (vk_fd >= 0)
     {
         len = read(vk_fd, vks, sizeof(vks)-1);
         close(vk_fd);
         if (len <= 0)
             return -1;

         vks[len] = '\0';

         /* Parse a line like:
             keytype:keycode:centerx:centery:width:height:keytype2:keycode2:centerx2:...
         */
         for (ts = vks, e->vk_count = 1; *ts; ++ts) {
             if (*ts == ':')
                 ++e->vk_count;
         }

         if (e->vk_count % 6) {
             printf("minui: %s is %d %% 6\n", vk_path, e->vk_count % 6);
         }
         e->vk_count /= 6;
         if (e->vk_count <= 0)
             return -1;

         e->down = DOWN_NOT;
     }

     ioctl(e->fd->fd, EVIOCGABS(ABS_X), &e->p.xi);
     ioctl(e->fd->fd, EVIOCGABS(ABS_Y), &e->p.yi);
     e->p.synced = 0;
 #ifdef _EVENT_LOGGING
     printf("EV: ST minX: %d  maxX: %d  minY: %d  maxY: %d\n", e->p.xi.minimum, e->p.xi.maximum, e->p.yi.minimum, e->p.yi.maximum);
 #endif

     ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_X), &e->mt_p.xi);
     ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_Y), &e->mt_p.yi);
     e->mt_p.synced = 0;
 #ifdef _EVENT_LOGGING
     printf("EV: MT minX: %d  maxX: %d  minY: %d  maxY: %d\n", e->mt_p.xi.minimum, e->mt_p.xi.maximum, e->mt_p.yi.minimum, e->mt_p.yi.maximum);
 #endif

     e->vks = malloc(sizeof(*e->vks) * e->vk_count);

     for (i = 0; i < e->vk_count; ++i) {
         char *token[6];
         int j;

         for (j = 0; j < 6; ++j) {
             token[j] = vk_strtok_r((i||j)?NULL:vks, ":", &ts);
         }

         if (strcmp(token[0], "0x01") != 0) {
             /* Java does string compare, so we do too. */
             printf("minui: %s: ignoring unknown virtual key type %s\n", vk_path, token[0]);
             continue;
         }

         e->vks[i].scancode = strtol(token[1], NULL, 0);
         e->vks[i].centerx = strtol(token[2], NULL, 0);
         e->vks[i].centery = strtol(token[3], NULL, 0);
         e->vks[i].width = strtol(token[4], NULL, 0);
         e->vks[i].height = strtol(token[5], NULL, 0);
     }

     return 0;
 }

 int ev_init(void)
 {
     DIR *dir;
     struct dirent *de;
     int fd;

 	dir = opendir("/dev/input");
     if(dir != 0) {
         while((de = readdir(dir))) {
 //            fprintf(stderr,"/dev/input/%s\n", de->d_name);
             if(strncmp(de->d_name,"event",5)) continue;
             fd = openat(dirfd(dir), de->d_name, O_RDONLY);
             if(fd < 0) continue;

 			ev_fds[ev_count].fd = fd;
             ev_fds[ev_count].events = POLLIN;
             evs[ev_count].fd = &ev_fds[ev_count];

             /* Load virtualkeys if there are any */
 			vk_init(&evs[ev_count]);

             ev_count++;
             if(ev_count == MAX_DEVICES) break;
         }
     }

     return 0;
 }

 void ev_exit(void)
 {
     while (ev_count-- > 0) {
 	if (evs[ev_count].vk_count) {
 		free(evs[ev_count].vks);
 		evs[ev_count].vk_count = 0;
 	}
         close(ev_fds[ev_count].fd);
     }
 }

 static int vk_inside_display(__s32 value, struct input_absinfo *info, int screen_size)
 {
     int screen_pos;

     if (info->minimum == info->maximum)
         return 0;

     screen_pos = (value - info->minimum) * (screen_size - 1) / (info->maximum - info->minimum);
     return (screen_pos >= 0 && screen_pos < screen_size);
 }

 static int vk_tp_to_screen(struct position *p, int *x, int *y)
 {
     if (p->xi.minimum == p->xi.maximum || p->yi.minimum == p->yi.maximum)
     {
         // In this case, we assume the screen dimensions are the same.
         *x = p->x;
         *y = p->y;
         return 0;
     }

 #ifdef _EVENT_LOGGING
     printf("EV: p->x=%d  x-range=%d,%d  fb-width=%d\n", p->x, p->xi.minimum, p->xi.maximum, gr_fb_width());
 #endif

 #ifndef RECOVERY_TOUCHSCREEN_SWAP_XY
     int fb_width = gr_fb_width();
     int fb_height = gr_fb_height();
 #else
     // We need to swap the scaling sizes, too
     int fb_width = gr_fb_height();
     int fb_height = gr_fb_width();
 #endif

     *x = (p->x - p->xi.minimum) * (fb_width - 1) / (p->xi.maximum - p->xi.minimum);
     *y = (p->y - p->yi.minimum) * (fb_height - 1) / (p->yi.maximum - p->yi.minimum);

     if (*x >= 0 && *x < fb_width &&
         *y >= 0 && *y < fb_height)
     {
         return 0;
     }

     return 1;
 }

 /* Translate a virtual key in to a real key event, if needed */
 /* Returns non-zero when the event should be consumed */
 static int vk_modify(struct ev *e, struct input_event *ev)
 {
     static int downX = -1, downY = -1;
     static int discard = 0;
     static int lastWasSynReport = 0;
     static int touchReleaseOnNextSynReport = 0;
     int i;
     int x, y;

     // This is used to ditch useless event handlers, like an accelerometer
     if (e->ignored)     return 1;

     if (ev->type == EV_REL && ev->code == REL_Z)
     {
         // This appears to be an accelerometer or another strange input device. It's not the touchscreen.
 #ifdef _EVENT_LOGGING
         printf("EV: Device disabled due to non-touchscreen messages.\n");
 #endif
         e->ignored = 1;
         return 1;
     }

 #ifdef _EVENT_LOGGING
     printf("EV: %s => type: %x  code: %x  value: %d\n", e->deviceName, ev->type, ev->code, ev->value);
 #endif

 	// Handle keyboard events, value of 1 indicates key down, 0 indicates key up
 	if (ev->type == EV_KEY) {
 		return 0;
 	}

     if (ev->type == EV_ABS) {
         switch (ev->code) {

         case ABS_X: //00
             e->p.synced |= 0x01;
             e->p.x = ev->value;
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_X  %d\n", e->deviceName, ev->value);
 #endif
             break;

         case ABS_Y: //01
             e->p.synced |= 0x02;
             e->p.y = ev->value;
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_Y  %d\n", e->deviceName, ev->value);
 #endif
             break;

         case ABS_MT_POSITION: //2a
             e->mt_p.synced = 0x03;
             if (ev->value == (1 << 31))
             {
                 e->mt_p.x = 0;
                 e->mt_p.y = 0;
                 lastWasSynReport = 1;
             }
             else
             {
                 lastWasSynReport = 0;
                 e->mt_p.x = (ev->value & 0x7FFF0000) >> 16;
                 e->mt_p.y = (ev->value & 0xFFFF);
             }
             break;

         case ABS_MT_TOUCH_MAJOR: //30
             if (ev->value == 0)
             {
                 // We're in a touch release, although some devices will still send positions as well
                 e->mt_p.x = 0;
                 e->mt_p.y = 0;
                 touchReleaseOnNextSynReport = 1;
             }
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_MT_TOUCH_MAJOR  %d\n", e->deviceName, ev->value);
 #endif
             break;

 		case ABS_MT_PRESSURE: //3a
                     if (ev->value == 0)
             {
                 // We're in a touch release, although some devices will still send positions as well
                 e->mt_p.x = 0;
                 e->mt_p.y = 0;
                 touchReleaseOnNextSynReport = 1;
             }
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_MT_PRESSURE  %d\n", e->deviceName, ev->value);
 #endif
             break;

 		case ABS_MT_POSITION_X: //35
             e->mt_p.synced |= 0x01;
             e->mt_p.x = ev->value;
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_MT_POSITION_X  %d\n", e->deviceName, ev->value);
 #endif
             break;

         case ABS_MT_POSITION_Y: //36
             e->mt_p.synced |= 0x02;
             e->mt_p.y = ev->value;
 #ifdef _EVENT_LOGGING
             printf("EV: %s => EV_ABS  ABS_MT_POSITION_Y  %d\n", e->deviceName, ev->value);
 #endif
             break;

 #ifdef _EVENT_LOGGING
 		// All of these items are strictly for logging purposes only. Return 1 because they don't need to be handled.
         case ABS_MT_TOUCH_MINOR: //31
             printf("EV: %s => EV_ABS ABS_MT_TOUCH_MINOR %d\n", e->deviceName, ev->value);
 			return 1;
             break;

         case ABS_MT_WIDTH_MAJOR: //32
             printf("EV: %s => EV_ABS ABS_MT_WIDTH_MAJOR %d\n", e->deviceName, ev->value);
 			return 1;
             break;

         case ABS_MT_WIDTH_MINOR: //33
             printf("EV: %s => EV_ABS ABS_MT_WIDTH_MINOR %d\n", e->deviceName, ev->value);
 			return 1;
             break;

         case ABS_MT_ORIENTATION: //34
             printf("EV: %s => EV_ABS ABS_MT_ORIENTATION %d\n", e->deviceName, ev->value);
 			return 1;
             break;

 		case ABS_MT_TOOL_TYPE: //37
             LOGI("EV: %s => EV_ABS ABS_MT_TOOL_TYPE %d\n", e->deviceName, ev->value);
 			return 1;
             break;

         case ABS_MT_BLOB_ID: //38
             printf("EV: %s => EV_ABS ABS_MT_BLOB_ID %d\n", e->deviceName, ev->value);
 			return 1;
             break;

         case ABS_MT_TRACKING_ID: //39
             printf("EV: %s => EV_ABS ABS_MT_TRACKING_ID %d\n", e->deviceName, ev->value);
 			return 1;
             break;

 		case ABS_MT_DISTANCE: //3b
             printf("EV: %s => EV_ABS ABS_MT_DISTANCE %d\n", e->deviceName, ev->value);
 			return 1;
             break;
 #endif

         default:
             // This is an unhandled message, just skip it
             return 1;
         }

         if (ev->code != ABS_MT_POSITION)
         {
             lastWasSynReport = 0;
             return 1;
         }
     }

     // Check if we should ignore the message
     if (ev->code != ABS_MT_POSITION && (ev->type != EV_SYN || (ev->code != SYN_REPORT && ev->code != SYN_MT_REPORT)))
     {
         lastWasSynReport = 0;
         return 0;
     }

 #ifdef _EVENT_LOGGING
     if (ev->type == EV_SYN && ev->code == SYN_REPORT)       printf("EV: %s => EV_SYN  SYN_REPORT\n", e->deviceName);
     if (ev->type == EV_SYN && ev->code == SYN_MT_REPORT)    printf("EV: %s => EV_SYN  SYN_MT_REPORT\n", e->deviceName);
 #endif

     // Discard the MT versions
     if (ev->code == SYN_MT_REPORT)      return 0;

     if (lastWasSynReport == 1 || touchReleaseOnNextSynReport == 1)
     {
         // Reset the value
         touchReleaseOnNextSynReport = 0;

         // We are a finger-up state
         if (!discard)
         {
             // Report the key up
             ev->type = EV_ABS;
             ev->code = 0;
             ev->value = (downX << 16) | downY;
         }
         downX = -1;
         downY = -1;
         if (discard)
         {
             discard = 0;
             return 1;
         }
         return 0;
     }
     lastWasSynReport = 1;

     // Retrieve where the x,y position is
     if (e->p.synced & 0x03)
     {
         vk_tp_to_screen(&e->p, &x, &y);
     }
     else if (e->mt_p.synced & 0x03)
     {
         vk_tp_to_screen(&e->mt_p, &x, &y);
     }
     else
     {
         // We don't have useful information to convey
         return 1;
     }

 #ifdef RECOVERY_TOUCHSCREEN_SWAP_XY
     x ^= y;
     y ^= x;
     x ^= y;
 #endif
 #ifdef RECOVERY_TOUCHSCREEN_FLIP_X
     x = gr_fb_width() - x;
 #endif
 #ifdef RECOVERY_TOUCHSCREEN_FLIP_Y
     y = gr_fb_height() - y;
 #endif

 #ifdef _EVENT_LOGGING
     printf("EV: x: %d  y: %d\n", x, y);
 #endif

     // Clear the current sync states
     e->p.synced = e->mt_p.synced = 0;

     // If we have nothing useful to report, skip it
     if (x == -1 || y == -1)     return 1;

     // On first touch, see if we're at a virtual key
     if (downX == -1)
     {
         // Attempt mapping to virtual key
         for (i = 0; i < e->vk_count; ++i)
         {
             int xd = ABS(e->vks[i].centerx - x);
             int yd = ABS(e->vks[i].centery - y);

             if (xd < e->vks[i].width/2 && yd < e->vks[i].height/2)
             {
                 ev->type = EV_KEY;
                 ev->code = e->vks[i].scancode;
                 ev->value = 1;

                 vibrate(VIBRATOR_TIME_MS);

                 // Mark that all further movement until lift is discard,
                 // and make sure we don't come back into this area
                 discard = 1;
                 downX = 0;
                 return 0;
             }
         }
     }

     // If we were originally a button press, discard this event
     if (discard)
     {
         return 1;
     }

     // Record where we started the touch for deciding if this is a key or a scroll
     downX = x;
     downY = y;

     ev->type = EV_ABS;
     ev->code = 1;
     ev->value = (x << 16) | y;
     return 0;
 }

 int ev_get(struct input_event *ev, unsigned dont_wait)
 {
     int r;
     unsigned n;

     do {
         r = poll(ev_fds, ev_count, dont_wait ? 0 : -1);

         if(r > 0) {
             for(n = 0; n < ev_count; n++) {
                 if(ev_fds[n].revents & POLLIN) {
                     r = read(ev_fds[n].fd, ev, sizeof(*ev));
                     if(r == sizeof(*ev)) {
                         if (!vk_modify(&evs[n], ev))
                             return 0;
                     }
                 }
             }
         }
     } while(dont_wait == 0);

     return -1;
 }

 int ev_wait(int timeout)
 {
     return -1;
 }

 void ev_dispatch(void)
 {
     return;
 }

 int ev_get_input(int fd, short revents, struct input_event *ev)
 {
     return -1;
 }
	/*
	* Copyright (C) 2007 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.
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <fcntl.h>
	#include <dirent.h>
	#include <sys/poll.h>
	#include <limits.h>

	#include <linux/input.h>

	#include "../common.h"

	#include "minui.h"

	//#define _EVENT_LOGGING

	#define MAX_DEVICES 16

	#define VIBRATOR_TIMEOUT_FILE "/sys/class/timed_output/vibrator/enable"
	#define VIBRATOR_TIME_MS 50

	#ifndef SYN_REPORT
	#define SYN_REPORT 0x00
	#endif
	#ifndef SYN_CONFIG
	#define SYN_CONFIG 0x01
	#endif
	#ifndef SYN_MT_REPORT
	#define SYN_MT_REPORT 0x02
	#endif

	#define ABS_MT_POSITION 0x2a /* Group a set of X and Y */
	#define ABS_MT_AMPLITUDE 0x2b /* Group a set of Z and W */
	#define ABS_MT_SLOT 0x2f
	#define ABS_MT_TOUCH_MAJOR 0x30
	#define ABS_MT_TOUCH_MINOR 0x31
	#define ABS_MT_WIDTH_MAJOR 0x32
	#define ABS_MT_WIDTH_MINOR 0x33
	#define ABS_MT_ORIENTATION 0x34
	#define ABS_MT_POSITION_X 0x35
	#define ABS_MT_POSITION_Y 0x36
	#define ABS_MT_TOOL_TYPE 0x37
	#define ABS_MT_BLOB_ID 0x38
	#define ABS_MT_TRACKING_ID 0x39
	#define ABS_MT_PRESSURE 0x3a
	#define ABS_MT_DISTANCE 0x3b

	enum {
	DOWN_NOT,
	DOWN_SENT,
	DOWN_RELEASED,
	};

	struct virtualkey {
	int scancode;
	int centerx, centery;
	int width, height;
	};

	struct position {
	int x, y;
	int synced;
	struct input_absinfo xi, yi;
	};

	struct ev {
	struct pollfd *fd;

	struct virtualkey *vks;
	int vk_count;

	char deviceName[64];

	int ignored;

	struct position p, mt_p;
	int down;
	};

	static struct pollfd ev_fds[MAX_DEVICES];
	static struct ev evs[MAX_DEVICES];
	static unsigned ev_count = 0;

	static inline int ABS(int x) {
	return x<0?-x:x;
	}

	int vibrate(int timeout_ms)
	{
	char str[20];
	int fd;
	int ret;

	fd = open(VIBRATOR_TIMEOUT_FILE, O_WRONLY);
	if (fd < 0)
	return -1;

	ret = snprintf(str, sizeof(str), "%d", timeout_ms);
	ret = write(fd, str, ret);
	close(fd);

	if (ret < 0)
	return -1;

	return 0;
	}

	/* Returns empty tokens */
	static char vk_strtok_r(char str, const char delim, char *save_str)
	{
	if(!str)
	{
	if(!*save_str)
	return NULL;

	str = (*save_str) + 1;
	}
	*save_str = strpbrk(str, delim);

	if (*save_str)
	**save_str = '\0';

	return str;
	}

	static int vk_init(struct ev *e)
	{
	char vk_path[PATH_MAX] = "/sys/board_properties/virtualkeys.";
	char vks[2048], *ts = NULL;
	ssize_t len;
	int vk_fd;
	int i;

	e->vk_count = 0;

	len = strlen(vk_path);
	len = ioctl(e->fd->fd, EVIOCGNAME(sizeof(e->deviceName)), e->deviceName);
	if (len <= 0)
	{
	printf("Unable to query event object.\n");
	return -1;
	}
	#ifdef _EVENT_LOGGING
	printf("Event object: %s\n", e->deviceName);
	#endif

	// Blacklist these "input" devices
	if (strcmp(e->deviceName, "bma250") == 0 \|\| strcmp(e->deviceName, "bma150") == 0)
	{
	e->ignored = 1;
	}

	strcat(vk_path, e->deviceName);

	// Some devices split the keys from the touchscreen
	e->vk_count = 0;
	vk_fd = open(vk_path, O_RDONLY);
	if (vk_fd >= 0)
	{
	len = read(vk_fd, vks, sizeof(vks)-1);
	close(vk_fd);
	if (len <= 0)
	return -1;

	vks[len] = '\0';

	/* Parse a line like:
	keytype:keycode:centerx:centery:width:height:keytype2:keycode2:centerx2:...
	*/
	for (ts = vks, e->vk_count = 1; *ts; ++ts) {
	if (*ts == ':')
	++e->vk_count;
	}

	if (e->vk_count % 6) {
	printf("minui: %s is %d %% 6\n", vk_path, e->vk_count % 6);
	}
	e->vk_count /= 6;
	if (e->vk_count <= 0)
	return -1;

	e->down = DOWN_NOT;
	}

	ioctl(e->fd->fd, EVIOCGABS(ABS_X), &e->p.xi);
	ioctl(e->fd->fd, EVIOCGABS(ABS_Y), &e->p.yi);
	e->p.synced = 0;
	#ifdef _EVENT_LOGGING
	printf("EV: ST minX: %d maxX: %d minY: %d maxY: %d\n", e->p.xi.minimum, e->p.xi.maximum, e->p.yi.minimum, e->p.yi.maximum);
	#endif

	ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_X), &e->mt_p.xi);
	ioctl(e->fd->fd, EVIOCGABS(ABS_MT_POSITION_Y), &e->mt_p.yi);
	e->mt_p.synced = 0;
	#ifdef _EVENT_LOGGING
	printf("EV: MT minX: %d maxX: %d minY: %d maxY: %d\n", e->mt_p.xi.minimum, e->mt_p.xi.maximum, e->mt_p.yi.minimum, e->mt_p.yi.maximum);
	#endif

	e->vks = malloc(sizeof(e->vks) e->vk_count);

	for (i = 0; i < e->vk_count; ++i) {
	char *token[6];
	int j;

	for (j = 0; j < 6; ++j) {
	token[j] = vk_strtok_r((i\|\|j)?NULL:vks, ":", &ts);
	}

	if (strcmp(token[0], "0x01") != 0) {
	/* Java does string compare, so we do too. */
	printf("minui: %s: ignoring unknown virtual key type %s\n", vk_path, token[0]);
	continue;
	}

	e->vks[i].scancode = strtol(token[1], NULL, 0);
	e->vks[i].centerx = strtol(token[2], NULL, 0);
	e->vks[i].centery = strtol(token[3], NULL, 0);
	e->vks[i].width = strtol(token[4], NULL, 0);
	e->vks[i].height = strtol(token[5], NULL, 0);
	}

	return 0;
	}

	int ev_init(void)
	{
	DIR *dir;
	struct dirent *de;
	int fd;

	dir = opendir("/dev/input");
	if(dir != 0) {
	while((de = readdir(dir))) {
	// fprintf(stderr,"/dev/input/%s\n", de->d_name);
	if(strncmp(de->d_name,"event",5)) continue;
	fd = openat(dirfd(dir), de->d_name, O_RDONLY);
	if(fd < 0) continue;

	ev_fds[ev_count].fd = fd;
	ev_fds[ev_count].events = POLLIN;
	evs[ev_count].fd = &ev_fds[ev_count];

	/* Load virtualkeys if there are any */
	vk_init(&evs[ev_count]);

	ev_count++;
	if(ev_count == MAX_DEVICES) break;
	}
	}

	return 0;
	}

	void ev_exit(void)
	{
	while (ev_count-- > 0) {
	if (evs[ev_count].vk_count) {
	free(evs[ev_count].vks);
	evs[ev_count].vk_count = 0;
	}
	close(ev_fds[ev_count].fd);
	}
	}

	static int vk_inside_display(__s32 value, struct input_absinfo *info, int screen_size)
	{
	int screen_pos;

	if (info->minimum == info->maximum)
	return 0;

	screen_pos = (value - info->minimum) * (screen_size - 1) / (info->maximum - info->minimum);
	return (screen_pos >= 0 && screen_pos < screen_size);
	}

	static int vk_tp_to_screen(struct position p, int x, int *y)
	{
	if (p->xi.minimum == p->xi.maximum \|\| p->yi.minimum == p->yi.maximum)
	{
	// In this case, we assume the screen dimensions are the same.
	*x = p->x;
	*y = p->y;
	return 0;
	}

	#ifdef _EVENT_LOGGING
	printf("EV: p->x=%d x-range=%d,%d fb-width=%d\n", p->x, p->xi.minimum, p->xi.maximum, gr_fb_width());
	#endif

	#ifndef RECOVERY_TOUCHSCREEN_SWAP_XY
	int fb_width = gr_fb_width();
	int fb_height = gr_fb_height();
	#else
	// We need to swap the scaling sizes, too
	int fb_width = gr_fb_height();
	int fb_height = gr_fb_width();
	#endif

	x = (p->x - p->xi.minimum) (fb_width - 1) / (p->xi.maximum - p->xi.minimum);
	y = (p->y - p->yi.minimum) (fb_height - 1) / (p->yi.maximum - p->yi.minimum);

	if (x >= 0 && x < fb_width &&
	y >= 0 && y < fb_height)
	{
	return 0;
	}

	return 1;
	}

	/* Translate a virtual key in to a real key event, if needed */
	/* Returns non-zero when the event should be consumed */
	static int vk_modify(struct ev e, struct input_event ev)
	{
	static int downX = -1, downY = -1;
	static int discard = 0;
	static int lastWasSynReport = 0;
	static int touchReleaseOnNextSynReport = 0;
	int i;
	int x, y;

	// This is used to ditch useless event handlers, like an accelerometer
	if (e->ignored) return 1;

	if (ev->type == EV_REL && ev->code == REL_Z)
	{
	// This appears to be an accelerometer or another strange input device. It's not the touchscreen.
	#ifdef _EVENT_LOGGING
	printf("EV: Device disabled due to non-touchscreen messages.\n");
	#endif
	e->ignored = 1;
	return 1;
	}

	#ifdef _EVENT_LOGGING
	printf("EV: %s => type: %x code: %x value: %d\n", e->deviceName, ev->type, ev->code, ev->value);
	#endif

	// Handle keyboard events, value of 1 indicates key down, 0 indicates key up
	if (ev->type == EV_KEY) {
	return 0;
	}

	if (ev->type == EV_ABS) {
	switch (ev->code) {

	case ABS_X: //00
	e->p.synced \|= 0x01;
	e->p.x = ev->value;
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_X %d\n", e->deviceName, ev->value);
	#endif
	break;

	case ABS_Y: //01
	e->p.synced \|= 0x02;
	e->p.y = ev->value;
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_Y %d\n", e->deviceName, ev->value);
	#endif
	break;

	case ABS_MT_POSITION: //2a
	e->mt_p.synced = 0x03;
	if (ev->value == (1 << 31))
	{
	e->mt_p.x = 0;
	e->mt_p.y = 0;
	lastWasSynReport = 1;
	}
	else
	{
	lastWasSynReport = 0;
	e->mt_p.x = (ev->value & 0x7FFF0000) >> 16;
	e->mt_p.y = (ev->value & 0xFFFF);
	}
	break;

	case ABS_MT_TOUCH_MAJOR: //30
	if (ev->value == 0)
	{
	// We're in a touch release, although some devices will still send positions as well
	e->mt_p.x = 0;
	e->mt_p.y = 0;
	touchReleaseOnNextSynReport = 1;
	}
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_MT_TOUCH_MAJOR %d\n", e->deviceName, ev->value);
	#endif
	break;

	case ABS_MT_PRESSURE: //3a
	if (ev->value == 0)
	{
	// We're in a touch release, although some devices will still send positions as well
	e->mt_p.x = 0;
	e->mt_p.y = 0;
	touchReleaseOnNextSynReport = 1;
	}
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_MT_PRESSURE %d\n", e->deviceName, ev->value);
	#endif
	break;

	case ABS_MT_POSITION_X: //35
	e->mt_p.synced \|= 0x01;
	e->mt_p.x = ev->value;
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_MT_POSITION_X %d\n", e->deviceName, ev->value);
	#endif
	break;

	case ABS_MT_POSITION_Y: //36
	e->mt_p.synced \|= 0x02;
	e->mt_p.y = ev->value;
	#ifdef _EVENT_LOGGING
	printf("EV: %s => EV_ABS ABS_MT_POSITION_Y %d\n", e->deviceName, ev->value);
	#endif
	break;

	#ifdef _EVENT_LOGGING
	// All of these items are strictly for logging purposes only. Return 1 because they don't need to be handled.
	case ABS_MT_TOUCH_MINOR: //31
	printf("EV: %s => EV_ABS ABS_MT_TOUCH_MINOR %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_WIDTH_MAJOR: //32
	printf("EV: %s => EV_ABS ABS_MT_WIDTH_MAJOR %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_WIDTH_MINOR: //33
	printf("EV: %s => EV_ABS ABS_MT_WIDTH_MINOR %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_ORIENTATION: //34
	printf("EV: %s => EV_ABS ABS_MT_ORIENTATION %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_TOOL_TYPE: //37
	LOGI("EV: %s => EV_ABS ABS_MT_TOOL_TYPE %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_BLOB_ID: //38
	printf("EV: %s => EV_ABS ABS_MT_BLOB_ID %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_TRACKING_ID: //39
	printf("EV: %s => EV_ABS ABS_MT_TRACKING_ID %d\n", e->deviceName, ev->value);
	return 1;
	break;

	case ABS_MT_DISTANCE: //3b
	printf("EV: %s => EV_ABS ABS_MT_DISTANCE %d\n", e->deviceName, ev->value);
	return 1;
	break;
	#endif

	default:
	// This is an unhandled message, just skip it
	return 1;
	}

	if (ev->code != ABS_MT_POSITION)
	{
	lastWasSynReport = 0;
	return 1;
	}
	}

	// Check if we should ignore the message
	if (ev->code != ABS_MT_POSITION && (ev->type != EV_SYN \|\| (ev->code != SYN_REPORT && ev->code != SYN_MT_REPORT)))
	{
	lastWasSynReport = 0;
	return 0;
	}

	#ifdef _EVENT_LOGGING
	if (ev->type == EV_SYN && ev->code == SYN_REPORT) printf("EV: %s => EV_SYN SYN_REPORT\n", e->deviceName);
	if (ev->type == EV_SYN && ev->code == SYN_MT_REPORT) printf("EV: %s => EV_SYN SYN_MT_REPORT\n", e->deviceName);
	#endif

	// Discard the MT versions
	if (ev->code == SYN_MT_REPORT) return 0;

	if (lastWasSynReport == 1 \|\| touchReleaseOnNextSynReport == 1)
	{
	// Reset the value
	touchReleaseOnNextSynReport = 0;

	// We are a finger-up state
	if (!discard)
	{
	// Report the key up
	ev->type = EV_ABS;
	ev->code = 0;
	ev->value = (downX << 16) \| downY;
	}
	downX = -1;
	downY = -1;
	if (discard)
	{
	discard = 0;
	return 1;
	}
	return 0;
	}
	lastWasSynReport = 1;

	// Retrieve where the x,y position is
	if (e->p.synced & 0x03)
	{
	vk_tp_to_screen(&e->p, &x, &y);
	}
	else if (e->mt_p.synced & 0x03)
	{
	vk_tp_to_screen(&e->mt_p, &x, &y);
	}
	else
	{
	// We don't have useful information to convey
	return 1;
	}

	#ifdef RECOVERY_TOUCHSCREEN_SWAP_XY
	x ^= y;
	y ^= x;
	x ^= y;
	#endif
	#ifdef RECOVERY_TOUCHSCREEN_FLIP_X
	x = gr_fb_width() - x;
	#endif
	#ifdef RECOVERY_TOUCHSCREEN_FLIP_Y
	y = gr_fb_height() - y;
	#endif

	#ifdef _EVENT_LOGGING
	printf("EV: x: %d y: %d\n", x, y);
	#endif

	// Clear the current sync states
	e->p.synced = e->mt_p.synced = 0;

	// If we have nothing useful to report, skip it
	if (x == -1 \|\| y == -1) return 1;

	// On first touch, see if we're at a virtual key
	if (downX == -1)
	{
	// Attempt mapping to virtual key
	for (i = 0; i < e->vk_count; ++i)
	{
	int xd = ABS(e->vks[i].centerx - x);
	int yd = ABS(e->vks[i].centery - y);

	if (xd < e->vks[i].width/2 && yd < e->vks[i].height/2)
	{
	ev->type = EV_KEY;
	ev->code = e->vks[i].scancode;
	ev->value = 1;

	vibrate(VIBRATOR_TIME_MS);

	// Mark that all further movement until lift is discard,
	// and make sure we don't come back into this area
	discard = 1;
	downX = 0;
	return 0;
	}
	}
	}

	// If we were originally a button press, discard this event
	if (discard)
	{
	return 1;
	}

	// Record where we started the touch for deciding if this is a key or a scroll
	downX = x;
	downY = y;

	ev->type = EV_ABS;
	ev->code = 1;
	ev->value = (x << 16) \| y;
	return 0;
	}

	int ev_get(struct input_event *ev, unsigned dont_wait)
	{
	int r;
	unsigned n;

	do {
	r = poll(ev_fds, ev_count, dont_wait ? 0 : -1);

	if(r > 0) {
	for(n = 0; n < ev_count; n++) {
	if(ev_fds[n].revents & POLLIN) {
	r = read(ev_fds[n].fd, ev, sizeof(*ev));
	if(r == sizeof(*ev)) {
	if (!vk_modify(&evs[n], ev))
	return 0;
	}
	}
	}
	}
	} while(dont_wait == 0);

	return -1;
	}

	int ev_wait(int timeout)
	{
	return -1;
	}

	void ev_dispatch(void)
	{
	return;
	}

	int ev_get_input(int fd, short revents, struct input_event *ev)
	{
	return -1;
	}