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|
/*
* (C) Gražvydas "notaz" Ignotas, 2008-2010
*
* This work is licensed under the terms of any of these licenses
* (at your option):
* - GNU GPL, version 2 or later.
* - GNU LGPL, version 2.1 or later.
* See the COPYING file in the top-level directory.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <linux/input.h>
#include <errno.h>
#include "../common/input.h"
#include "in_evdev.h"
#define MAX_ABS_DEVS 8
typedef struct {
int fd;
int *kbits;
int abs_min_x; /* abs->digital mapping */
int abs_max_x;
int abs_min_y;
int abs_max_y;
int abs_lzone;
int abs_lastx;
int abs_lasty;
int kc_first;
int kc_last;
unsigned int abs_count;
int abs_mult[MAX_ABS_DEVS]; /* 16.16 multiplier to IN_ABS_RANGE */
int abs_adj[MAX_ABS_DEVS]; /* adjust for centering */
unsigned int abs_to_digital:1;
} in_evdev_t;
#ifndef KEY_CNT
#define KEY_CNT (KEY_MAX + 1)
#endif
#define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
(1 << ((x) & (sizeof(keybits[0])*8-1))))
#define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] |= \
(1 << ((x) & (sizeof(keybits[0])*8-1))))
#define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
~(1 << ((x) & (sizeof(keybits[0])*8-1))))
int in_evdev_allow_abs_only;
#define IN_EVDEV_PREFIX "evdev:"
static const char * const in_evdev_keys[KEY_CNT] = {
[0 ... KEY_MAX] = NULL,
[KEY_RESERVED] = "Reserved", [KEY_ESC] = "Esc",
[KEY_1] = "1", [KEY_2] = "2",
[KEY_3] = "3", [KEY_4] = "4",
[KEY_5] = "5", [KEY_6] = "6",
[KEY_7] = "7", [KEY_8] = "8",
[KEY_9] = "9", [KEY_0] = "0",
[KEY_MINUS] = "Minus", [KEY_EQUAL] = "Equal",
[KEY_BACKSPACE] = "Backspace", [KEY_TAB] = "Tab",
[KEY_Q] = "Q", [KEY_W] = "W",
[KEY_E] = "E", [KEY_R] = "R",
[KEY_T] = "T", [KEY_Y] = "Y",
[KEY_U] = "U", [KEY_I] = "I",
[KEY_O] = "O", [KEY_P] = "P",
[KEY_LEFTBRACE] = "LeftBrace", [KEY_RIGHTBRACE] = "RightBrace",
[KEY_ENTER] = "Enter", [KEY_LEFTCTRL] = "LeftControl",
[KEY_A] = "A", [KEY_S] = "S",
[KEY_D] = "D", [KEY_F] = "F",
[KEY_G] = "G", [KEY_H] = "H",
[KEY_J] = "J", [KEY_K] = "K",
[KEY_L] = "L", [KEY_SEMICOLON] = "Semicolon",
[KEY_APOSTROPHE] = "Apostrophe", [KEY_GRAVE] = "Grave",
[KEY_LEFTSHIFT] = "LeftShift", [KEY_BACKSLASH] = "BackSlash",
[KEY_Z] = "Z", [KEY_X] = "X",
[KEY_C] = "C", [KEY_V] = "V",
[KEY_B] = "B", [KEY_N] = "N",
[KEY_M] = "M", [KEY_COMMA] = "Comma",
[KEY_DOT] = "Dot", [KEY_SLASH] = "Slash",
[KEY_RIGHTSHIFT] = "RightShift", [KEY_KPASTERISK] = "KPAsterisk",
[KEY_LEFTALT] = "LeftAlt", [KEY_SPACE] = "Space",
[KEY_CAPSLOCK] = "CapsLock", [KEY_F1] = "F1",
[KEY_F2] = "F2", [KEY_F3] = "F3",
[KEY_F4] = "F4", [KEY_F5] = "F5",
[KEY_F6] = "F6", [KEY_F7] = "F7",
[KEY_F8] = "F8", [KEY_F9] = "F9",
[KEY_F10] = "F10", [KEY_NUMLOCK] = "NumLock",
[KEY_SCROLLLOCK] = "ScrollLock", [KEY_KP7] = "KP7",
[KEY_KP8] = "KP8", [KEY_KP9] = "KP9",
[KEY_KPMINUS] = "KPMinus", [KEY_KP4] = "KP4",
[KEY_KP5] = "KP5", [KEY_KP6] = "KP6",
[KEY_KPPLUS] = "KPPlus", [KEY_KP1] = "KP1",
[KEY_KP2] = "KP2", [KEY_KP3] = "KP3",
[KEY_KP0] = "KP0", [KEY_KPDOT] = "KPDot",
[KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
[KEY_F11] = "F11", [KEY_F12] = "F12",
[KEY_KPJPCOMMA] = "KPJpComma", [KEY_KPENTER] = "KPEnter",
[KEY_RIGHTCTRL] = "RightCtrl", [KEY_KPSLASH] = "KPSlash",
[KEY_SYSRQ] = "SysRq", [KEY_RIGHTALT] = "RightAlt",
[KEY_LINEFEED] = "LineFeed", [KEY_HOME] = "Home",
[KEY_UP] = "Up", [KEY_PAGEUP] = "PageUp",
[KEY_LEFT] = "Left", [KEY_RIGHT] = "Right",
[KEY_END] = "End", [KEY_DOWN] = "Down",
[KEY_PAGEDOWN] = "PageDown", [KEY_INSERT] = "Insert",
[KEY_DELETE] = "Delete", [KEY_MACRO] = "Macro",
[KEY_HELP] = "Help", [KEY_MENU] = "Menu",
[KEY_COFFEE] = "Coffee", [KEY_DIRECTION] = "Direction",
[BTN_0] = "Btn0", [BTN_1] = "Btn1",
[BTN_2] = "Btn2", [BTN_3] = "Btn3",
[BTN_4] = "Btn4", [BTN_5] = "Btn5",
[BTN_6] = "Btn6", [BTN_7] = "Btn7",
[BTN_8] = "Btn8", [BTN_9] = "Btn9",
[BTN_LEFT] = "LeftBtn", [BTN_RIGHT] = "RightBtn",
[BTN_MIDDLE] = "MiddleBtn", [BTN_SIDE] = "SideBtn",
[BTN_EXTRA] = "ExtraBtn", [BTN_FORWARD] = "ForwardBtn",
[BTN_BACK] = "BackBtn", [BTN_TASK] = "TaskBtn",
[BTN_TRIGGER] = "Trigger", [BTN_THUMB] = "ThumbBtn",
[BTN_THUMB2] = "ThumbBtn2", [BTN_TOP] = "TopBtn",
[BTN_TOP2] = "TopBtn2", [BTN_PINKIE] = "PinkieBtn",
[BTN_BASE] = "BaseBtn", [BTN_BASE2] = "BaseBtn2",
[BTN_BASE3] = "BaseBtn3", [BTN_BASE4] = "BaseBtn4",
[BTN_BASE5] = "BaseBtn5", [BTN_BASE6] = "BaseBtn6",
[BTN_DEAD] = "BtnDead", [BTN_A] = "BtnA",
[BTN_B] = "BtnB", [BTN_C] = "BtnC",
[BTN_X] = "BtnX", [BTN_Y] = "BtnY",
[BTN_Z] = "BtnZ", [BTN_TL] = "BtnTL",
[BTN_TR] = "BtnTR", [BTN_TL2] = "BtnTL2",
[BTN_TR2] = "BtnTR2", [BTN_SELECT] = "BtnSelect",
[BTN_START] = "BtnStart", [BTN_MODE] = "BtnMode",
[BTN_THUMBL] = "BtnThumbL", [BTN_THUMBR] = "BtnThumbR",
[BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus",
[BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
[BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
[BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok",
};
static void in_evdev_probe(void)
{
long keybits[KEY_CNT / sizeof(long) / 8];
long absbits[(ABS_MAX+1) / sizeof(long) / 8];
int i;
// the kernel might support and return less keys then we know about,
// so make sure the buffers are clear.
memset(keybits, 0, sizeof(keybits));
memset(absbits, 0, sizeof(absbits));
for (i = 0;; i++)
{
int support = 0, count = 0;
int u, ret, fd, kc_first = KEY_MAX, kc_last = 0, have_abs = 0;
in_evdev_t *dev;
char name[64];
snprintf(name, sizeof(name), "/dev/input/event%d", i);
fd = open(name, O_RDONLY|O_NONBLOCK);
if (fd == -1) {
if (errno == EACCES)
continue; /* maybe we can access next one */
break;
}
/* check supported events */
ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
if (ret == -1) {
printf("in_evdev: ioctl failed on %s\n", name);
goto skip;
}
if (support & (1 << EV_KEY)) {
ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
if (ret == -1) {
printf("in_evdev: ioctl failed on %s\n", name);
goto skip;
}
/* check for interesting keys */
for (u = 0; u < KEY_CNT; u++) {
if (KEYBITS_BIT(u)) {
if (u < kc_first)
kc_first = u;
if (u > kc_last)
kc_last = u;
if (u != KEY_POWER && u != KEY_SLEEP && u != BTN_TOUCH)
count++;
if (u == BTN_TOUCH) /* we can't deal with ts currently */
goto skip;
}
}
}
dev = calloc(1, sizeof(*dev));
if (dev == NULL)
goto skip;
ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
if (ret == -1) {
printf("Warning: EVIOCGKEY not supported, will have to track state\n");
dev->kbits = calloc(KEY_CNT, sizeof(int));
if (dev->kbits == NULL) {
free(dev);
goto skip;
}
}
/* check for abs too */
if (support & (1 << EV_ABS)) {
struct input_absinfo ainfo;
int dist;
ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
if (ret == -1)
goto no_abs;
if (absbits[0] & (1 << ABS_X)) {
ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
if (ret == -1)
goto no_abs;
dist = ainfo.maximum - ainfo.minimum;
dev->abs_lzone = dist / 4;
dev->abs_min_x = ainfo.minimum;
dev->abs_max_x = ainfo.maximum;
}
if (absbits[0] & (1 << ABS_Y)) {
ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
if (ret == -1)
goto no_abs;
dist = ainfo.maximum - ainfo.minimum;
dev->abs_min_y = ainfo.minimum;
dev->abs_max_y = ainfo.maximum;
}
for (u = 0; u < MAX_ABS_DEVS; u++) {
ret = ioctl(fd, EVIOCGABS(u), &ainfo);
if (ret == -1)
break;
dist = ainfo.maximum - ainfo.minimum;
if (dist != 0)
dev->abs_mult[u] = IN_ABS_RANGE * 2 * 65536 / dist;
dev->abs_adj[u] = -(ainfo.maximum + ainfo.minimum + 1) / 2;
have_abs = 1;
}
dev->abs_count = u;
}
no_abs:
if (count == 0 && !have_abs) {
free(dev);
goto skip;
}
dev->fd = fd;
dev->kc_first = kc_first;
dev->kc_last = kc_last;
if (count > 0 || in_evdev_allow_abs_only)
dev->abs_to_digital = 1;
strcpy(name, IN_EVDEV_PREFIX);
ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
name+6, count, support);
in_register(name, fd, dev, KEY_CNT, in_evdev_keys, 0);
continue;
skip:
close(fd);
}
}
static void in_evdev_free(void *drv_data)
{
in_evdev_t *dev = drv_data;
if (dev == NULL)
return;
close(dev->fd);
free(dev);
}
static const char * const *
in_evdev_get_key_names(int *count)
{
*count = KEY_CNT;
return in_evdev_keys;
}
static void or_binds(const int *binds, int key, int *result)
{
int t;
for (t = 0; t < IN_BINDTYPE_COUNT; t++)
result[t] |= binds[IN_BIND_OFFS(key, t)];
}
/* ORs result with binds of pressed buttons
* XXX: should measure performance hit of this func, might need to optimize */
static int in_evdev_update(void *drv_data, const int *binds, int *result)
{
struct input_event ev[16];
struct input_absinfo ainfo;
int keybits_[KEY_CNT / sizeof(int)];
int *keybits = keybits_;
in_evdev_t *dev = drv_data;
int rd, ret, u, lzone;
if (dev->kbits == NULL) {
ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
if (ret == -1) {
perror("in_evdev: ioctl failed");
return -1;
}
}
else {
keybits = dev->kbits;
while (1) {
rd = read(dev->fd, ev, sizeof(ev));
if (rd < (int)sizeof(ev[0])) {
if (errno != EAGAIN)
perror("in_evdev: read failed");
break;
}
for (u = 0; u < rd / sizeof(ev[0]); u++) {
if (ev[u].type != EV_KEY)
continue;
else if (ev[u].value == 1)
KEYBITS_BIT_SET(ev[u].code);
else if (ev[u].value == 0)
KEYBITS_BIT_CLEAR(ev[u].code);
}
}
}
for (u = dev->kc_first; u <= dev->kc_last; u++) {
if (KEYBITS_BIT(u))
or_binds(binds, u, result);
}
/* map X and Y absolute to UDLR */
lzone = dev->abs_lzone;
if (dev->abs_to_digital && lzone != 0) {
ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
if (ret != -1) {
if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
}
ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
if (ret != -1) {
if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
if (ainfo.value > dev->abs_max_y - lzone) or_binds(binds, KEY_DOWN, result);
}
}
return 0;
}
static int in_evdev_update_analog(void *drv_data, int axis_id, int *result)
{
struct input_absinfo ainfo;
in_evdev_t *dev = drv_data;
int ret;
if ((unsigned int)axis_id >= MAX_ABS_DEVS)
return -1;
ret = ioctl(dev->fd, EVIOCGABS(axis_id), &ainfo);
if (ret != 0)
return ret;
*result = (ainfo.value + dev->abs_adj[axis_id]) * dev->abs_mult[axis_id];
*result >>= 16;
return 0;
}
static int in_evdev_set_blocking(in_evdev_t *dev, int y)
{
long flags;
int ret;
flags = (long)fcntl(dev->fd, F_GETFL);
if ((int)flags == -1) {
perror("in_evdev: F_GETFL fcntl failed");
return -1;
}
if (flags & O_NONBLOCK) {
/* flush the event queue */
struct input_event ev;
do {
ret = read(dev->fd, &ev, sizeof(ev));
}
while (ret == sizeof(ev));
}
if (y)
flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
ret = fcntl(dev->fd, F_SETFL, flags);
if (ret == -1) {
perror("in_evdev: F_SETFL fcntl failed");
return -1;
}
return 0;
}
static int in_evdev_get_config(void *drv_data, int what, int *val)
{
in_evdev_t *dev = drv_data;
switch (what) {
case IN_CFG_ABS_AXIS_COUNT:
*val = dev->abs_count;
break;
default:
return -1;
}
return 0;
}
static int in_evdev_set_config(void *drv_data, int what, int val)
{
in_evdev_t *dev = drv_data;
int tmp;
switch (what) {
case IN_CFG_BLOCKING:
return in_evdev_set_blocking(dev, val);
case IN_CFG_ABS_DEAD_ZONE:
if (val < 1 || val > 99 || dev->abs_lzone == 0)
return -1;
/* XXX: based on X axis only, for now.. */
tmp = (dev->abs_max_x - dev->abs_min_x) / 2;
dev->abs_lzone = tmp - tmp * val / 100;
if (dev->abs_lzone < 1)
dev->abs_lzone = 1;
else if (dev->abs_lzone >= tmp)
dev->abs_lzone = tmp - 1;
break;
default:
return -1;
}
return 0;
}
static int in_evdev_update_keycode(void *data, int *is_down)
{
int ret_kc = -1, ret_down = 0;
in_evdev_t *dev = data;
struct input_event ev;
int rd;
/* do single event, the caller sometimes wants
* to do select() in blocking mode */
rd = read(dev->fd, &ev, sizeof(ev));
if (rd < (int) sizeof(ev)) {
if (errno != EAGAIN) {
perror("in_evdev: error reading");
//sleep(1);
ret_kc = -2;
}
goto out;
}
if (ev.type == EV_KEY) {
if (ev.value < 0 || ev.value > 1)
goto out;
ret_kc = ev.code;
ret_down = ev.value;
goto out;
}
else if (ev.type == EV_ABS && dev->abs_to_digital)
{
int lzone = dev->abs_lzone, down = 0, *last;
// map absolute to up/down/left/right
if (lzone != 0 && ev.code == ABS_X) {
if (ev.value < dev->abs_min_x + lzone)
down = KEY_LEFT;
else if (ev.value > dev->abs_max_x - lzone)
down = KEY_RIGHT;
last = &dev->abs_lastx;
}
else if (lzone != 0 && ev.code == ABS_Y) {
if (ev.value < dev->abs_min_y + lzone)
down = KEY_UP;
else if (ev.value > dev->abs_max_y - lzone)
down = KEY_DOWN;
last = &dev->abs_lasty;
}
else
goto out;
if (down == *last)
goto out;
if (down == 0 || *last != 0) {
/* key up or direction change, return up event for old key */
ret_kc = *last;
ret_down = 0;
*last = 0;
goto out;
}
ret_kc = *last = down;
ret_down = 1;
goto out;
}
out:
if (is_down != NULL)
*is_down = ret_down;
return ret_kc;
}
static const struct {
short key;
short pbtn;
} key_pbtn_map[] =
{
{ KEY_UP, PBTN_UP },
{ KEY_DOWN, PBTN_DOWN },
{ KEY_LEFT, PBTN_LEFT },
{ KEY_RIGHT, PBTN_RIGHT },
/* XXX: maybe better set this from it's plat code somehow */
/* Pandora */
{ KEY_END, PBTN_MOK },
{ KEY_PAGEDOWN, PBTN_MBACK },
{ KEY_HOME, PBTN_MA2 },
{ KEY_PAGEUP, PBTN_MA3 },
{ KEY_LEFTCTRL, PBTN_MENU },
{ KEY_RIGHTSHIFT, PBTN_L },
{ KEY_RIGHTCTRL, PBTN_R },
/* Caanoo */
{ BTN_THUMB2, PBTN_MOK },
{ BTN_THUMB, PBTN_MBACK },
{ BTN_TRIGGER, PBTN_MA2 },
{ BTN_TOP, PBTN_MA3 },
{ BTN_BASE, PBTN_MENU },
{ BTN_TOP2, PBTN_L },
{ BTN_PINKIE, PBTN_R },
/* "normal" keyboards */
{ KEY_ENTER, PBTN_MOK },
{ KEY_ESC, PBTN_MBACK },
{ KEY_A, PBTN_MA2 },
{ KEY_S, PBTN_MA3 },
{ KEY_BACKSLASH, PBTN_MENU },
{ KEY_LEFTBRACE, PBTN_L },
{ KEY_RIGHTBRACE, PBTN_R },
};
#define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
static int in_evdev_menu_translate(void *drv_data, int keycode)
{
in_evdev_t *dev = drv_data;
int i;
if (keycode < 0)
{
/* menu -> kc */
keycode = -keycode;
for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
if (key_pbtn_map[i].pbtn == keycode) {
int k = key_pbtn_map[i].key;
/* should really check EVIOCGBIT, but this is enough for now */
if (dev->kc_first <= k && k <= dev->kc_last)
return k;
}
}
else
{
for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
if (key_pbtn_map[i].key == keycode)
return key_pbtn_map[i].pbtn;
}
return 0;
}
/* remove binds of missing keys, count remaining ones */
static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
{
int keybits[KEY_CNT / sizeof(int)];
in_evdev_t *dev = drv_data;
int i, t, ret, offs, count = 0;
memset(keybits, 0, sizeof(keybits));
ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
if (ret == -1) {
perror("in_evdev: ioctl failed");
// memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
}
if (dev->abs_to_digital && dev->abs_lzone != 0) {
KEYBITS_BIT_SET(KEY_LEFT);
KEYBITS_BIT_SET(KEY_RIGHT);
KEYBITS_BIT_SET(KEY_UP);
KEYBITS_BIT_SET(KEY_DOWN);
}
for (i = 0; i < KEY_CNT; i++) {
for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
offs = IN_BIND_OFFS(i, t);
if (!KEYBITS_BIT(i))
binds[offs] = def_binds[offs] = 0;
if (binds[offs])
count++;
}
}
return count;
}
static const in_drv_t in_evdev_drv = {
.prefix = IN_EVDEV_PREFIX,
.probe = in_evdev_probe,
.free = in_evdev_free,
.get_key_names = in_evdev_get_key_names,
.clean_binds = in_evdev_clean_binds,
.get_config = in_evdev_get_config,
.set_config = in_evdev_set_config,
.update = in_evdev_update,
.update_analog = in_evdev_update_analog,
.update_keycode = in_evdev_update_keycode,
.menu_translate = in_evdev_menu_translate,
};
void in_evdev_init(const struct in_default_bind *defbinds)
{
in_register_driver(&in_evdev_drv, defbinds);
}
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