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a8a89d1961998a0dffbafbec3de90774933ca515
android_bootable_recovery/minuitwrp/events.cpp
T
Ethan Yonker 64dbd0df84 Make input whitelist and blacklist work for mouse devices too 
Includes some minor code clean up. Also we are now outputting the
name of the first mouse device that we encounter to make it easier
to identify which device(s) may need to be blacklisted.

Change-Id: I515baf92967390edd224728f3a7092239138e6b8
2016-08-11 02:34:15 +02:00

795 lines
21 KiB
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/*
* 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 <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include "../common.h"
#include "minui.h"
//#define _EVENT_LOGGING
#define MAX_DEVICES 32
#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 struct timeval lastInputStat;
static unsigned long lastInputMTime;
static int has_mouse = 0;
static inline int ABS(int x) {
return x<0?-x:x;
}
int vibrate(int timeout_ms)
{
char str[20];
int fd;
int ret;
if (timeout_ms > 10000) timeout_ms = 1000;
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
#ifdef WHITELIST_INPUT
if (strcmp(e->deviceName, EXPAND(WHITELIST_INPUT)) != 0)
{
e->ignored = 1;
}
#else
#ifndef TW_INPUT_BLACKLIST
// Blacklist these "input" devices, use TW_INPUT_BLACKLIST := "accelerometer\x0atest1\x0atest2" using the \x0a as a separator between input devices
if (strcmp(e->deviceName, "bma250") == 0 || strcmp(e->deviceName, "bma150") == 0)
{
printf("blacklisting %s input device\n", e->deviceName);
e->ignored = 1;
}
#else
char* bl = strdup(EXPAND(TW_INPUT_BLACKLIST));
char* blacklist = strtok(bl, "\n");
while (blacklist != NULL) {
if (strcmp(e->deviceName, blacklist) == 0) {
printf("blacklisting %s input device\n", blacklist);
e->ignored = 1;
}
blacklist = strtok(NULL, "\n");
}
free(bl);
#endif
#endif
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 = (virtualkey *)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;
}
#define BITS_PER_LONG (sizeof(long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define OFF(x) ((x)%BITS_PER_LONG)
#define LONG(x) ((x)/BITS_PER_LONG)
#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
// Check for EV_REL (REL_X and REL_Y) and, because touchscreens can have those too,
// check also for EV_KEY (BTN_LEFT and BTN_RIGHT)
static void check_mouse(int fd, const char* deviceName)
{
if(has_mouse)
return;
unsigned long bit[EV_MAX][NBITS(KEY_MAX)];
memset(bit, 0, sizeof(bit));
ioctl(fd, EVIOCGBIT(0, EV_MAX), bit[0]);
if(!test_bit(EV_REL, bit[0]) || !test_bit(EV_KEY, bit[0]))
return;
ioctl(fd, EVIOCGBIT(EV_REL, KEY_MAX), bit[EV_REL]);
if(!test_bit(REL_X, bit[EV_REL]) || !test_bit(REL_Y, bit[EV_REL]))
return;
ioctl(fd, EVIOCGBIT(EV_KEY, KEY_MAX), bit[EV_KEY]);
if(!test_bit(BTN_LEFT, bit[EV_KEY]) || !test_bit(BTN_RIGHT, bit[EV_KEY]))
return;
printf("Found mouse '%s'\n", deviceName);
has_mouse = 1;
}
int ev_has_mouse(void)
{
return has_mouse;
}
int ev_init(void)
{
DIR *dir;
struct dirent *de;
int fd;
has_mouse = 0;
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]);
if (!evs[ev_count].ignored)
check_mouse(fd, evs[ev_count].deviceName);
ev_count++;
if(ev_count == MAX_DEVICES) break;
}
closedir(dir);
}
struct stat st;
if(stat("/dev/input", &st) >= 0)
lastInputMTime = st.st_mtime;
gettimeofday(&lastInputStat, NULL);
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);
}
ev_count = 0;
}
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 last_virt_key = 0;
static int lastWasSynReport = 0;
static int touchReleaseOnNextSynReport = 0;
static int use_tracking_id_negative_as_touch_release = 0; // On some devices, type: 3 code: 39 value: -1, aka EV_ABS ABS_MT_TRACKING_ID -1 indicates a true touch release
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))
{
#ifndef TW_IGNORE_MT_POSITION_0
e->mt_p.x = 0;
e->mt_p.y = 0;
lastWasSynReport = 1;
#endif
#ifdef _EVENT_LOGGING
#ifndef TW_IGNORE_MT_POSITION_0
printf("EV: %s => EV_ABS ABS_MT_POSITION %d, set x and y to 0 and lastWasSynReport to 1\n", e->deviceName, ev->value);
#else
printf("Ignoring ABS_MT_POSITION 0\n", e->deviceName, ev->value);
#endif
#endif
}
else
{
lastWasSynReport = 0;
e->mt_p.x = (ev->value & 0x7FFF0000) >> 16;
e->mt_p.y = (ev->value & 0xFFFF);
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_POSITION %d, set x: %d and y: %d and lastWasSynReport to 0\n", e->deviceName, ev->value, (ev->value & 0x7FFF0000) >> 16, (ev->value & 0xFFFF));
#endif
}
break;
case ABS_MT_TOUCH_MAJOR: //30
if (ev->value == 0)
{
#ifndef TW_IGNORE_MAJOR_AXIS_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;
#endif
}
#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;
case ABS_MT_TOUCH_MINOR: //31
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_TOUCH_MINOR %d\n", e->deviceName, ev->value);
#endif
break;
case ABS_MT_WIDTH_MAJOR: //32
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_WIDTH_MAJOR %d\n", e->deviceName, ev->value);
#endif
break;
case ABS_MT_WIDTH_MINOR: //33
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_WIDTH_MINOR %d\n", e->deviceName, ev->value);
#endif
break;
case ABS_MT_TRACKING_ID: //39
#ifdef TW_IGNORE_ABS_MT_TRACKING_ID
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_TRACKING_ID %d ignored\n", e->deviceName, ev->value);
#endif
return 1;
#endif
if (ev->value < 0) {
e->mt_p.x = 0;
e->mt_p.y = 0;
touchReleaseOnNextSynReport = 2;
use_tracking_id_negative_as_touch_release = 1;
#ifdef _EVENT_LOGGING
if (use_tracking_id_negative_as_touch_release)
printf("using ABS_MT_TRACKING_ID value -1 to indicate touch releases\n");
#endif
}
#ifdef _EVENT_LOGGING
printf("EV: %s => EV_ABS ABS_MT_TRACKING_ID %d\n", e->deviceName, ev->value);
#endif
break;
#ifdef _EVENT_LOGGING
// These are for touch logging purposes only
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_DISTANCE: //3b
printf("EV: %s => EV_ABS ABS_MT_DISTANCE %d\n", e->deviceName, ev->value);
return 1;
break;
case ABS_MT_SLOT:
printf("EV: %s => ABS_MT_SLOT %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) && !use_tracking_id_negative_as_touch_release) || (use_tracking_id_negative_as_touch_release && touchReleaseOnNextSynReport == 2))
{
// 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;
// Send the keyUp event
ev->type = EV_KEY;
ev->code = last_virt_key;
ev->value = 0;
}
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;
// Special case, we'll ignore touches on 0,0 because it usually means
// that we received extra data after our last sync and x and y were
// reset to 0. We should not be using 0,0 anyway.
if (x == 0 && y == 0)
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;
last_virt_key = e->vks[i].scancode;
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, int timeout_ms)
{
int r;
unsigned n;
struct timeval curr;
gettimeofday(&curr, NULL);
if(curr.tv_sec - lastInputStat.tv_sec >= 2)
{
struct stat st;
stat("/dev/input", &st);
if (st.st_mtime > lastInputMTime)
{
printf("Reloading input devices\n");
ev_exit();
ev_init();
lastInputMTime = st.st_mtime;
}
lastInputStat = curr;
}
r = poll(ev_fds, ev_count, timeout_ms);
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;
}
}
}
return -1;
}
return -2;
}
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;
}
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