[libpicofe.git] / linux / in_evdev.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2008-2012
 *
 * 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.
 *  - MAME license.
 * 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>
#ifdef __FreeBSD__
#include <dev/evdev/input.h>
#else
#include <linux/input.h>
#endif
#include <errno.h>

#include "../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;

	const in_drv_t *drv;
} 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, // not necessary
	[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(const in_drv_t *drv)
{
	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;

		dev->drv = drv;

		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->kbits);
			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(const in_drv_t *drv, int *count)
{
	const struct in_pdata *pdata = drv->pdata;
	*count = KEY_CNT;

	if (pdata->key_names)
		return pdata->key_names;
	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_kbd(void *drv_data, const int *binds, int *result)
{
	return in_evdev_update(drv_data, binds, result);
}

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, enum in_cfg_opt what, int *val)
{
	in_evdev_t *dev = drv_data;

	switch (what) {
	case IN_CFG_ABS_AXIS_COUNT:
		*val = dev->abs_count;
		break;
	case IN_CFG_ANALOG_MAP_ULDR:
		*val = dev->abs_to_digital;
	default:
		return -1;
	}

	return 0;
}

static int in_evdev_set_config(void *drv_data, enum in_cfg_opt 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;
	case IN_CFG_ANALOG_MAP_ULDR:
		dev->abs_to_digital = val;
	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 int in_evdev_menu_translate(void *drv_data, int keycode, char *charcode)
{
	in_evdev_t *dev = drv_data;
	const struct in_pdata *pdata = dev->drv->pdata;
	int ret = 0;
	int i;

	if (keycode < 0)
	{
		/* menu -> kc */
		keycode = -keycode;
		for (i = 0; i < pdata->kmap_size; i++)
			if (pdata->key_map[i].pbtn == keycode) {
				int k = pdata->key_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 < pdata->kmap_size; i++) {
			if (pdata->key_map[i].key == keycode) {
				ret = pdata->key_map[i].pbtn;
				break;
			}
		}

		if (charcode != NULL && (unsigned int)keycode < KEY_CNT &&
		    in_evdev_keys[keycode] != NULL && in_evdev_keys[keycode][1] == 0)
		{
			char c = in_evdev_keys[keycode][0];
			if ('A' <= c && c <= 'Z')
				c = 'a' + c - 'A';
			ret |= PBTN_CHAR;
			*charcode = c;
		}
	}

	return ret;
}

/* 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_kbd      = in_evdev_update_kbd,
	.update_analog   = in_evdev_update_analog,
	.update_keycode  = in_evdev_update_keycode,
	.menu_translate  = in_evdev_menu_translate,
};

int in_evdev_init(const struct in_pdata *pdata)
{
	if (!pdata) {
		fprintf(stderr, "in_sdl: Missing input platform data\n");
		return -1;
	}

	in_register_driver(&in_evdev_drv, pdata->defbinds, pdata->kbd_map, pdata);
	return 0;
}
Commit	Line	Data
957a9eac	1	/*
f89d8471	2	* (C) Gražvydas "notaz" Ignotas, 2008-2012
957a9eac	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
f89d8471	8	* - MAME license.
957a9eac	9	* See the COPYING file in the top-level directory.
	10	*/
	11
d92ea048	12	#include <stdio.h>
86883f7f	13	#include <stdlib.h>
d92ea048	14	#include <string.h>
	15	#include <sys/types.h>
	16	#include <sys/stat.h>
	17	#include <fcntl.h>
	18	#include <sys/ioctl.h>
	19	#include <unistd.h>
babe4580 MG	20	#ifdef __FreeBSD__
	21	#include <dev/evdev/input.h>
	22	#else
d92ea048	23	#include <linux/input.h>
babe4580	24	#endif
d92ea048	25	#include <errno.h>
d92ea048	26
a86e9a3e	27	#include "../input.h"
34581c95	28	#include "in_evdev.h"
d92ea048	29
f342bede	30	#define MAX_ABS_DEVS 8
f342bede	31
86883f7f	32	typedef struct {
86883f7f	33	int fd;
0d6fbb2c	34	int *kbits;
f342bede	35	int abs_min_x; /* abs->digital mapping */
e9b29264	36	int abs_max_x;
	37	int abs_min_y;
	38	int abs_max_y;
86883f7f	39	int abs_lzone;
86883f7f	40	int abs_lastx;
86883f7f	41	int abs_lasty;
e9b29264	42	int kc_first;
e9b29264	43	int kc_last;
f342bede	44	unsigned int abs_count;
2f54e52c	45	int abs_mult[MAX_ABS_DEVS]; /* 16.16 multiplier to IN_ABS_RANGE */
2f54e52c	46	int abs_adj[MAX_ABS_DEVS]; /* adjust for centering */
f342bede	47	unsigned int abs_to_digital:1;
c19e28f6 PC	48
c19e28f6 PC	49	const in_drv_t *drv;
86883f7f	50	} in_evdev_t;
86883f7f	51
8e77275e	52	#ifndef KEY_CNT
	53	#define KEY_CNT (KEY_MAX + 1)
	54	#endif
	55
da767bd5	56	#define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
d92ea048	57	(1 << ((x) & (sizeof(keybits[0])*8-1))))
d92ea048	58
86883f7f	59	#define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] \|= \
	60	(1 << ((x) & (sizeof(keybits[0])*8-1))))
	61
0d6fbb2c	62	#define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
	63	~(1 << ((x) & (sizeof(keybits[0])*8-1))))
	64
0c924681	65	int in_evdev_allow_abs_only;
0c924681	66
9056e81f	67	#define IN_EVDEV_PREFIX "evdev:"
9056e81f	68
8e77275e	69	static const char * const in_evdev_keys[KEY_CNT] = {
cab91943	70	// [0 ... KEY_MAX] = NULL, // not necessary
595491c4	71	[KEY_RESERVED] = "Reserved", [KEY_ESC] = "Esc",
	72	[KEY_1] = "1", [KEY_2] = "2",
	73	[KEY_3] = "3", [KEY_4] = "4",
	74	[KEY_5] = "5", [KEY_6] = "6",
	75	[KEY_7] = "7", [KEY_8] = "8",
	76	[KEY_9] = "9", [KEY_0] = "0",
	77	[KEY_MINUS] = "Minus", [KEY_EQUAL] = "Equal",
	78	[KEY_BACKSPACE] = "Backspace", [KEY_TAB] = "Tab",
	79	[KEY_Q] = "Q", [KEY_W] = "W",
	80	[KEY_E] = "E", [KEY_R] = "R",
	81	[KEY_T] = "T", [KEY_Y] = "Y",
	82	[KEY_U] = "U", [KEY_I] = "I",
	83	[KEY_O] = "O", [KEY_P] = "P",
	84	[KEY_LEFTBRACE] = "LeftBrace", [KEY_RIGHTBRACE] = "RightBrace",
	85	[KEY_ENTER] = "Enter", [KEY_LEFTCTRL] = "LeftControl",
	86	[KEY_A] = "A", [KEY_S] = "S",
	87	[KEY_D] = "D", [KEY_F] = "F",
	88	[KEY_G] = "G", [KEY_H] = "H",
	89	[KEY_J] = "J", [KEY_K] = "K",
	90	[KEY_L] = "L", [KEY_SEMICOLON] = "Semicolon",
	91	[KEY_APOSTROPHE] = "Apostrophe", [KEY_GRAVE] = "Grave",
	92	[KEY_LEFTSHIFT] = "LeftShift", [KEY_BACKSLASH] = "BackSlash",
	93	[KEY_Z] = "Z", [KEY_X] = "X",
	94	[KEY_C] = "C", [KEY_V] = "V",
	95	[KEY_B] = "B", [KEY_N] = "N",
	96	[KEY_M] = "M", [KEY_COMMA] = "Comma",
	97	[KEY_DOT] = "Dot", [KEY_SLASH] = "Slash",
	98	[KEY_RIGHTSHIFT] = "RightShift", [KEY_KPASTERISK] = "KPAsterisk",
	99	[KEY_LEFTALT] = "LeftAlt", [KEY_SPACE] = "Space",
	100	[KEY_CAPSLOCK] = "CapsLock", [KEY_F1] = "F1",
	101	[KEY_F2] = "F2", [KEY_F3] = "F3",
	102	[KEY_F4] = "F4", [KEY_F5] = "F5",
	103	[KEY_F6] = "F6", [KEY_F7] = "F7",
	104	[KEY_F8] = "F8", [KEY_F9] = "F9",
	105	[KEY_F10] = "F10", [KEY_NUMLOCK] = "NumLock",
	106	[KEY_SCROLLLOCK] = "ScrollLock", [KEY_KP7] = "KP7",
	107	[KEY_KP8] = "KP8", [KEY_KP9] = "KP9",
	108	[KEY_KPMINUS] = "KPMinus", [KEY_KP4] = "KP4",
	109	[KEY_KP5] = "KP5", [KEY_KP6] = "KP6",
	110	[KEY_KPPLUS] = "KPPlus", [KEY_KP1] = "KP1",
	111	[KEY_KP2] = "KP2", [KEY_KP3] = "KP3",
	112	[KEY_KP0] = "KP0", [KEY_KPDOT] = "KPDot",
	113	[KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
	114	[KEY_F11] = "F11", [KEY_F12] = "F12",
	115	[KEY_KPJPCOMMA] = "KPJpComma", [KEY_KPENTER] = "KPEnter",
	116	[KEY_RIGHTCTRL] = "RightCtrl", [KEY_KPSLASH] = "KPSlash",
	117	[KEY_SYSRQ] = "SysRq", [KEY_RIGHTALT] = "RightAlt",
	118	[KEY_LINEFEED] = "LineFeed", [KEY_HOME] = "Home",
	119	[KEY_UP] = "Up", [KEY_PAGEUP] = "PageUp",
	120	[KEY_LEFT] = "Left", [KEY_RIGHT] = "Right",
	121	[KEY_END] = "End", [KEY_DOWN] = "Down",
	122	[KEY_PAGEDOWN] = "PageDown", [KEY_INSERT] = "Insert",
	123	[KEY_DELETE] = "Delete", [KEY_MACRO] = "Macro",
	124	[KEY_HELP] = "Help", [KEY_MENU] = "Menu",
	125	[KEY_COFFEE] = "Coffee", [KEY_DIRECTION] = "Direction",
	126	[BTN_0] = "Btn0", [BTN_1] = "Btn1",
	127	[BTN_2] = "Btn2", [BTN_3] = "Btn3",
	128	[BTN_4] = "Btn4", [BTN_5] = "Btn5",
	129	[BTN_6] = "Btn6", [BTN_7] = "Btn7",
	130	[BTN_8] = "Btn8", [BTN_9] = "Btn9",
	131	[BTN_LEFT] = "LeftBtn", [BTN_RIGHT] = "RightBtn",
	132	[BTN_MIDDLE] = "MiddleBtn", [BTN_SIDE] = "SideBtn",
	133	[BTN_EXTRA] = "ExtraBtn", [BTN_FORWARD] = "ForwardBtn",
	134	[BTN_BACK] = "BackBtn", [BTN_TASK] = "TaskBtn",
135	[BTN_TRIGGER] = "Trigger", [BTN_THUMB] = "ThumbBtn",
136	[BTN_THUMB2] = "ThumbBtn2", [BTN_TOP] = "TopBtn",
137	[BTN_TOP2] = "TopBtn2", [BTN_PINKIE] = "PinkieBtn",
138	[BTN_BASE] = "BaseBtn", [BTN_BASE2] = "BaseBtn2",
139	[BTN_BASE3] = "BaseBtn3", [BTN_BASE4] = "BaseBtn4",
140	[BTN_BASE5] = "BaseBtn5", [BTN_BASE6] = "BaseBtn6",
141	[BTN_DEAD] = "BtnDead", [BTN_A] = "BtnA",
142	[BTN_B] = "BtnB", [BTN_C] = "BtnC",
143	[BTN_X] = "BtnX", [BTN_Y] = "BtnY",
144	[BTN_Z] = "BtnZ", [BTN_TL] = "BtnTL",
145	[BTN_TR] = "BtnTR", [BTN_TL2] = "BtnTL2",
146	[BTN_TR2] = "BtnTR2", [BTN_SELECT] = "BtnSelect",
147	[BTN_START] = "BtnStart", [BTN_MODE] = "BtnMode",
148	[BTN_THUMBL] = "BtnThumbL", [BTN_THUMBR] = "BtnThumbR",
149	[BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus",
150	[BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
151	[BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
152	[BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok",
153	};
154
155
c19e28f6	156	static void in_evdev_probe(const in_drv_t *drv)
d92ea048	157	{
fbe11103	158	long keybits[KEY_CNT / sizeof(long) / 8];
fbe11103	159	long absbits[(ABS_MAX+1) / sizeof(long) / 8];
d92ea048	160	int i;
d92ea048	161
fbe11103	162	// the kernel might support and return less keys then we know about,
	163	// so make sure the buffers are clear.
	164	memset(keybits, 0, sizeof(keybits));
	165	memset(absbits, 0, sizeof(absbits));
	166
2258f158	167	for (i = 0;; i++)
d92ea048	168	{
d92ea048	169	int support = 0, count = 0;
f342bede	170	int u, ret, fd, kc_first = KEY_MAX, kc_last = 0, have_abs = 0;
86883f7f	171	in_evdev_t *dev;
d92ea048	172	char name[64];
	173
	174	snprintf(name, sizeof(name), "/dev/input/event%d", i);
0b3e1198	175	fd = open(name, O_RDONLY\|O_NONBLOCK);
8e77275e	176	if (fd == -1) {
	177	if (errno == EACCES)
	178	continue; /* maybe we can access next one */
d92ea048	179	break;
8e77275e	180	}
d92ea048	181
	182	/* check supported events */
	183	ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
	184	if (ret == -1) {
2258f158	185	printf("in_evdev: ioctl failed on %s\n", name);
d92ea048	186	goto skip;
	187	}
	188
0c924681	189	if (support & (1 << EV_KEY)) {
	190	ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
	191	if (ret == -1) {
	192	printf("in_evdev: ioctl failed on %s\n", name);
	193	goto skip;
	194	}
d92ea048	195
0c924681	196	/* check for interesting keys */
	197	for (u = 0; u < KEY_CNT; u++) {
	198	if (KEYBITS_BIT(u)) {
	199	if (u < kc_first)
	200	kc_first = u;
	201	if (u > kc_last)
	202	kc_last = u;
	203	if (u != KEY_POWER && u != KEY_SLEEP && u != BTN_TOUCH)
	204	count++;
	205	if (u == BTN_TOUCH) /* we can't deal with ts currently */
	206	goto skip;
	207	}
e9b29264	208	}
d92ea048	209	}
d92ea048	210
86883f7f	211	dev = calloc(1, sizeof(*dev));
	212	if (dev == NULL)
	213	goto skip;
	214
c19e28f6 PC	215	dev->drv = drv;
c19e28f6 PC	216
0d6fbb2c	217	ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
	218	if (ret == -1) {
	219	printf("Warning: EVIOCGKEY not supported, will have to track state\n");
	220	dev->kbits = calloc(KEY_CNT, sizeof(int));
	221	if (dev->kbits == NULL) {
	222	free(dev);
	223	goto skip;
	224	}
	225	}
	226
86883f7f	227	/* check for abs too */
	228	if (support & (1 << EV_ABS)) {
	229	struct input_absinfo ainfo;
	230	int dist;
	231	ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
	232	if (ret == -1)
	233	goto no_abs;
	234	if (absbits[0] & (1 << ABS_X)) {
	235	ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
	236	if (ret == -1)
	237	goto no_abs;
	238	dist = ainfo.maximum - ainfo.minimum;
e9b29264	239	dev->abs_lzone = dist / 4;
	240	dev->abs_min_x = ainfo.minimum;
	241	dev->abs_max_x = ainfo.maximum;
86883f7f	242	}
	243	if (absbits[0] & (1 << ABS_Y)) {
	244	ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
	245	if (ret == -1)
	246	goto no_abs;
	247	dist = ainfo.maximum - ainfo.minimum;
e9b29264	248	dev->abs_min_y = ainfo.minimum;
e9b29264	249	dev->abs_max_y = ainfo.maximum;
86883f7f	250	}
f342bede	251	for (u = 0; u < MAX_ABS_DEVS; u++) {
	252	ret = ioctl(fd, EVIOCGABS(u), &ainfo);
	253	if (ret == -1)
	254	break;
	255	dist = ainfo.maximum - ainfo.minimum;
	256	if (dist != 0)
	257	dev->abs_mult[u] = IN_ABS_RANGE * 2 * 65536 / dist;
2f54e52c	258	dev->abs_adj[u] = -(ainfo.maximum + ainfo.minimum + 1) / 2;
f342bede	259	have_abs = 1;
	260	}
	261	dev->abs_count = u;
86883f7f	262	}
	263
	264	no_abs:
f342bede	265	if (count == 0 && !have_abs) {
80881824	266	free(dev->kbits);
0c924681	267	free(dev);
	268	goto skip;
	269	}
	270
86883f7f	271	dev->fd = fd;
e9b29264	272	dev->kc_first = kc_first;
e9b29264	273	dev->kc_last = kc_last;
f342bede	274	if (count > 0 \|\| in_evdev_allow_abs_only)
f342bede	275	dev->abs_to_digital = 1;
9056e81f	276	strcpy(name, IN_EVDEV_PREFIX);
2258f158	277	ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
	278	printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
	279	name+6, count, support);
9056e81f	280	in_register(name, fd, dev, KEY_CNT, in_evdev_keys, 0);
d92ea048	281	continue;
	282
	283	skip:
	284	close(fd);
	285	}
d92ea048	286	}
d92ea048	287
da767bd5	288	static void in_evdev_free(void *drv_data)
2258f158	289	{
86883f7f	290	in_evdev_t *dev = drv_data;
	291	if (dev == NULL)
	292	return;
	293	close(dev->fd);
	294	free(dev);
2258f158	295	}
2258f158	296
090c1b1a	297	static const char * const *
d685ce46	298	in_evdev_get_key_names(const in_drv_t drv, int count)
d92ea048	299	{
d685ce46	300	const struct in_pdata *pdata = drv->pdata;
090c1b1a	301	*count = KEY_CNT;
d685ce46 PC	302
	303	if (pdata->key_names)
	304	return pdata->key_names;
090c1b1a	305	return in_evdev_keys;
d92ea048	306	}
d92ea048	307
8e77275e	308	static void or_binds(const int binds, int key, int result)
	309	{
	310	int t;
	311	for (t = 0; t < IN_BINDTYPE_COUNT; t++)
	312	result[t] \|= binds[IN_BIND_OFFS(key, t)];
	313	}
	314
	315	/* ORs result with binds of pressed buttons
	316	* XXX: should measure performance hit of this func, might need to optimize */
9056e81f	317	static int in_evdev_update(void drv_data, const int binds, int *result)
d92ea048	318	{
d92ea048	319	struct input_event ev[16];
86883f7f	320	struct input_absinfo ainfo;
0d6fbb2c	321	int keybits_[KEY_CNT / sizeof(int)];
0d6fbb2c	322	int *keybits = keybits_;
86883f7f	323	in_evdev_t *dev = drv_data;
e9b29264	324	int rd, ret, u, lzone;
d92ea048	325
0d6fbb2c	326	if (dev->kbits == NULL) {
782b026e	327	ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
0d6fbb2c	328	if (ret == -1) {
	329	perror("in_evdev: ioctl failed");
	330	return -1;
d92ea048	331	}
2258f158	332	}
0d6fbb2c	333	else {
	334	keybits = dev->kbits;
	335	while (1) {
	336	rd = read(dev->fd, ev, sizeof(ev));
	337	if (rd < (int)sizeof(ev[0])) {
	338	if (errno != EAGAIN)
	339	perror("in_evdev: read failed");
	340	break;
	341	}
	342	for (u = 0; u < rd / sizeof(ev[0]); u++) {
	343	if (ev[u].type != EV_KEY)
	344	continue;
	345	else if (ev[u].value == 1)
	346	KEYBITS_BIT_SET(ev[u].code);
	347	else if (ev[u].value == 0)
	348	KEYBITS_BIT_CLEAR(ev[u].code);
	349	}
	350	}
2258f158	351	}
d92ea048	352
e9b29264	353	for (u = dev->kc_first; u <= dev->kc_last; u++) {
8e77275e	354	if (KEYBITS_BIT(u))
8e77275e	355	or_binds(binds, u, result);
d92ea048	356	}
d92ea048	357
86883f7f	358	/* map X and Y absolute to UDLR */
e9b29264	359	lzone = dev->abs_lzone;
f342bede	360	if (dev->abs_to_digital && lzone != 0) {
86883f7f	361	ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
86883f7f	362	if (ret != -1) {
e9b29264	363	if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
e9b29264	364	if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
86883f7f	365	}
86883f7f	366	ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
86883f7f	367	if (ret != -1) {
e9b29264	368	if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
e9b29264	369	if (ainfo.value > dev->abs_max_y - lzone) or_binds(binds, KEY_DOWN, result);
86883f7f	370	}
	371	}
	372
8e77275e	373	return 0;
d92ea048	374	}
d92ea048	375
4acbd7fe	376	static int in_evdev_update_kbd(void drv_data, const int binds, int *result)
b047d2e2	377	{
	378	return in_evdev_update(drv_data, binds, result);
	379	}
	380
f342bede	381	static int in_evdev_update_analog(void drv_data, int axis_id, int result)
	382	{
	383	struct input_absinfo ainfo;
	384	in_evdev_t *dev = drv_data;
	385	int ret;
	386
	387	if ((unsigned int)axis_id >= MAX_ABS_DEVS)
	388	return -1;
	389
	390	ret = ioctl(dev->fd, EVIOCGABS(axis_id), &ainfo);
	391	if (ret != 0)
	392	return ret;
	393
2f54e52c	394	result = (ainfo.value + dev->abs_adj[axis_id]) dev->abs_mult[axis_id];
2f54e52c	395	*result >>= 16;
f342bede	396	return 0;
	397	}
	398
e9b29264	399	static int in_evdev_set_blocking(in_evdev_t *dev, int y)
34581c95	400	{
34581c95	401	long flags;
595491c4	402	int ret;
34581c95	403
86883f7f	404	flags = (long)fcntl(dev->fd, F_GETFL);
595491c4	405	if ((int)flags == -1) {
595491c4	406	perror("in_evdev: F_GETFL fcntl failed");
e9b29264	407	return -1;
34581c95	408	}
0c2e114e	409
	410	if (flags & O_NONBLOCK) {
	411	/* flush the event queue */
	412	struct input_event ev;
	413	do {
	414	ret = read(dev->fd, &ev, sizeof(ev));
	415	}
	416	while (ret == sizeof(ev));
	417	}
	418
595491c4	419	if (y)
	420	flags &= ~O_NONBLOCK;
	421	else
	422	flags \|= O_NONBLOCK;
86883f7f	423	ret = fcntl(dev->fd, F_SETFL, flags);
e9b29264	424	if (ret == -1) {
595491c4	425	perror("in_evdev: F_SETFL fcntl failed");
e9b29264	426	return -1;
	427	}
	428
	429	return 0;
	430	}
	431
3f4a964c	432	static int in_evdev_get_config(void drv_data, enum in_cfg_opt what, int val)
f342bede	433	{
	434	in_evdev_t *dev = drv_data;
	435
	436	switch (what) {
	437	case IN_CFG_ABS_AXIS_COUNT:
	438	*val = dev->abs_count;
	439	break;
e3c0b886	440	case IN_CFG_ANALOG_MAP_ULDR:
e3c0b886	441	*val = dev->abs_to_digital;
f342bede	442	default:
	443	return -1;
	444	}
	445
	446	return 0;
	447	}
	448
3f4a964c	449	static int in_evdev_set_config(void *drv_data, enum in_cfg_opt what, int val)
e9b29264	450	{
	451	in_evdev_t *dev = drv_data;
	452	int tmp;
	453
	454	switch (what) {
	455	case IN_CFG_BLOCKING:
	456	return in_evdev_set_blocking(dev, val);
	457	case IN_CFG_ABS_DEAD_ZONE:
	458	if (val < 1 \|\| val > 99 \|\| dev->abs_lzone == 0)
	459	return -1;
	460	/* XXX: based on X axis only, for now.. */
	461	tmp = (dev->abs_max_x - dev->abs_min_x) / 2;
	462	dev->abs_lzone = tmp - tmp * val / 100;
	463	if (dev->abs_lzone < 1)
	464	dev->abs_lzone = 1;
	465	else if (dev->abs_lzone >= tmp)
	466	dev->abs_lzone = tmp - 1;
	467	break;
e3c0b886	468	case IN_CFG_ANALOG_MAP_ULDR:
e3c0b886	469	dev->abs_to_digital = val;
e9b29264	470	default:
	471	return -1;
	472	}
	473
	474	return 0;
595491c4	475	}
595491c4	476
7f022a8d	477	static int in_evdev_update_keycode(void data, int is_down)
595491c4	478	{
e9b29264	479	int ret_kc = -1, ret_down = 0;
7f022a8d	480	in_evdev_t *dev = data;
	481	struct input_event ev;
	482	int rd;
906bdc9f	483
e3068458	484	/* do single event, the caller sometimes wants
	485	* to do select() in blocking mode */
	486	rd = read(dev->fd, &ev, sizeof(ev));
	487	if (rd < (int) sizeof(ev)) {
	488	if (errno != EAGAIN) {
	489	perror("in_evdev: error reading");
090c1b1a	490	//sleep(1);
090c1b1a	491	ret_kc = -2;
74065be8	492	}
e3068458	493	goto out;
e3068458	494	}
e9b29264	495
e3068458	496	if (ev.type == EV_KEY) {
e3068458	497	if (ev.value < 0 \|\| ev.value > 1)
e9b29264	498	goto out;
e3068458	499	ret_kc = ev.code;
	500	ret_down = ev.value;
	501	goto out;
	502	}
f342bede	503	else if (ev.type == EV_ABS && dev->abs_to_digital)
e3068458	504	{
	505	int lzone = dev->abs_lzone, down = 0, *last;
	506
	507	// map absolute to up/down/left/right
	508	if (lzone != 0 && ev.code == ABS_X) {
	509	if (ev.value < dev->abs_min_x + lzone)
	510	down = KEY_LEFT;
	511	else if (ev.value > dev->abs_max_x - lzone)
	512	down = KEY_RIGHT;
	513	last = &dev->abs_lastx;
74065be8	514	}
e3068458	515	else if (lzone != 0 && ev.code == ABS_Y) {
	516	if (ev.value < dev->abs_min_y + lzone)
	517	down = KEY_UP;
	518	else if (ev.value > dev->abs_max_y - lzone)
	519	down = KEY_DOWN;
	520	last = &dev->abs_lasty;
	521	}
	522	else
	523	goto out;
	524
	525	if (down == *last)
	526	goto out;
	527
	528	if (down == 0 \|\| *last != 0) {
	529	/* key up or direction change, return up event for old key */
	530	ret_kc = *last;
	531	ret_down = 0;
	532	*last = 0;
e9b29264	533	goto out;
34581c95	534	}
e3068458	535	ret_kc = *last = down;
	536	ret_down = 1;
	537	goto out;
34581c95	538	}
7f022a8d	539
e9b29264	540	out:
	541	if (is_down != NULL)
	542	*is_down = ret_down;
	543
	544	return ret_kc;
595491c4	545	}
34581c95	546
dd1e7172	547	static int in_evdev_menu_translate(void drv_data, int keycode, char charcode)
595491c4	548	{
e9b29264	549	in_evdev_t *dev = drv_data;
c19e28f6	550	const struct in_pdata *pdata = dev->drv->pdata;
dd1e7172	551	int ret = 0;
82abf46f	552	int i;
e9b29264	553
82abf46f	554	if (keycode < 0)
	555	{
	556	/* menu -> kc */
	557	keycode = -keycode;
c19e28f6 PC	558	for (i = 0; i < pdata->kmap_size; i++)
	559	if (pdata->key_map[i].pbtn == keycode) {
	560	int k = pdata->key_map[i].key;
e9b29264	561	/* should really check EVIOCGBIT, but this is enough for now */
	562	if (dev->kc_first <= k && k <= dev->kc_last)
	563	return k;
	564	}
34581c95	565	}
82abf46f	566	else
82abf46f	567	{
c19e28f6 PC	568	for (i = 0; i < pdata->kmap_size; i++) {
	569	if (pdata->key_map[i].key == keycode) {
	570	ret = pdata->key_map[i].pbtn;
dd1e7172	571	break;
	572	}
	573	}
	574
	575	if (charcode != NULL && (unsigned int)keycode < KEY_CNT &&
	576	in_evdev_keys[keycode] != NULL && in_evdev_keys[keycode][1] == 0)
	577	{
	578	char c = in_evdev_keys[keycode][0];
	579	if ('A' <= c && c <= 'Z')
	580	c = 'a' + c - 'A';
	581	ret \|= PBTN_CHAR;
	582	*charcode = c;
	583	}
82abf46f	584	}
82abf46f	585
dd1e7172	586	return ret;
595491c4	587	}
34581c95	588
86883f7f	589	/* remove binds of missing keys, count remaining ones */
8e77275e	590	static int in_evdev_clean_binds(void drv_data, int binds, int *def_binds)
da767bd5	591	{
8e77275e	592	int keybits[KEY_CNT / sizeof(int)];
86883f7f	593	in_evdev_t *dev = drv_data;
8e77275e	594	int i, t, ret, offs, count = 0;
da767bd5	595
bde5dcbb	596	memset(keybits, 0, sizeof(keybits));
86883f7f	597	ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
da767bd5	598	if (ret == -1) {
da767bd5	599	perror("in_evdev: ioctl failed");
bde5dcbb	600	// memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
da767bd5	601	}
da767bd5	602
f342bede	603	if (dev->abs_to_digital && dev->abs_lzone != 0) {
86883f7f	604	KEYBITS_BIT_SET(KEY_LEFT);
86883f7f	605	KEYBITS_BIT_SET(KEY_RIGHT);
86883f7f	606	KEYBITS_BIT_SET(KEY_UP);
	607	KEYBITS_BIT_SET(KEY_DOWN);
	608	}
	609
8e77275e	610	for (i = 0; i < KEY_CNT; i++) {
	611	for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
	612	offs = IN_BIND_OFFS(i, t);
	613	if (!KEYBITS_BIT(i))
	614	binds[offs] = def_binds[offs] = 0;
	615	if (binds[offs])
	616	count++;
	617	}
da767bd5	618	}
	619
	620	return count;
	621	}
	622
9056e81f	623	static const in_drv_t in_evdev_drv = {
b047d2e2	624	.prefix = IN_EVDEV_PREFIX,
	625	.probe = in_evdev_probe,
	626	.free = in_evdev_free,
	627	.get_key_names = in_evdev_get_key_names,
	628	.clean_binds = in_evdev_clean_binds,
	629	.get_config = in_evdev_get_config,
	630	.set_config = in_evdev_set_config,
	631	.update = in_evdev_update,
4acbd7fe	632	.update_kbd = in_evdev_update_kbd,
b047d2e2	633	.update_analog = in_evdev_update_analog,
	634	.update_keycode = in_evdev_update_keycode,
	635	.menu_translate = in_evdev_menu_translate,
9056e81f	636	};
9056e81f	637
c19e28f6	638	int in_evdev_init(const struct in_pdata *pdata)
da767bd5	639	{
c19e28f6 PC	640	if (!pdata) {
	641	fprintf(stderr, "in_sdl: Missing input platform data\n");
	642	return -1;
	643	}
	644
c567bf4c	645	in_register_driver(&in_evdev_drv, pdata->defbinds, pdata->kbd_map, pdata);
c19e28f6	646	return 0;
da767bd5	647	}
da767bd5	648