[thirdparty/systemd.git] / src / udev / udev-builtin-input_id.c

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * expose input properties via udev
 *
 * Portions Copyright © 2004 David Zeuthen, <david@fubar.dk>
 * Copyright © 2014 Carlos Garnacho <carlosg@gnome.org>
 */

#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/limits.h>

#include "device-util.h"
#include "fd-util.h"
#include "missing_input.h"
#include "stdio-util.h"
#include "string-util.h"
#include "udev-builtin.h"
#include "util.h"

/* we must use this kernel-compatible implementation */
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define OFF(x)  ((x)%BITS_PER_LONG)
#define BIT(x)  (1UL<<OFF(x))
#define LONG(x) ((x)/BITS_PER_LONG)
#define test_bit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)

struct range {
        unsigned start;
        unsigned end;
};

/* key code ranges above BTN_MISC (start is inclusive, stop is exclusive)*/
static const struct range high_key_blocks[] = {
        { KEY_OK, BTN_DPAD_UP },
        { KEY_ALS_TOGGLE, BTN_TRIGGER_HAPPY }
};

static int abs_size_mm(const struct input_absinfo *absinfo) {
        /* Resolution is defined to be in units/mm for ABS_X/Y */
        return (absinfo->maximum - absinfo->minimum) / absinfo->resolution;
}

static void extract_info(sd_device *dev, const char *devpath, bool test) {
        char width[DECIMAL_STR_MAX(int)], height[DECIMAL_STR_MAX(int)];
        struct input_absinfo xabsinfo = {}, yabsinfo = {};
        _cleanup_close_ int fd = -1;

        fd = open(devpath, O_RDONLY|O_CLOEXEC);
        if (fd < 0)
                return;

        if (ioctl(fd, EVIOCGABS(ABS_X), &xabsinfo) < 0 ||
            ioctl(fd, EVIOCGABS(ABS_Y), &yabsinfo) < 0)
                return;

        if (xabsinfo.resolution <= 0 || yabsinfo.resolution <= 0)
                return;

        xsprintf(width, "%d", abs_size_mm(&xabsinfo));
        xsprintf(height, "%d", abs_size_mm(&yabsinfo));

        udev_builtin_add_property(dev, test, "ID_INPUT_WIDTH_MM", width);
        udev_builtin_add_property(dev, test, "ID_INPUT_HEIGHT_MM", height);
}

/*
 * Read a capability attribute and return bitmask.
 * @param dev sd_device
 * @param attr sysfs attribute name (e. g. "capabilities/key")
 * @param bitmask: Output array which has a sizeof of bitmask_size
 */
static void get_cap_mask(sd_device *pdev, const char* attr,
                         unsigned long *bitmask, size_t bitmask_size,
                         bool test) {
        const char *v;
        char text[4096];
        unsigned i;
        char* word;
        unsigned long val;

        if (sd_device_get_sysattr_value(pdev, attr, &v) < 0)
                v = "";

        xsprintf(text, "%s", v);
        log_device_debug(pdev, "%s raw kernel attribute: %s", attr, text);

        memzero(bitmask, bitmask_size);
        i = 0;
        while ((word = strrchr(text, ' ')) != NULL) {
                val = strtoul(word+1, NULL, 16);
                if (i < bitmask_size / sizeof(unsigned long))
                        bitmask[i] = val;
                else
                        log_device_debug(pdev, "Ignoring %s block %lX which is larger than maximum size", attr, val);
                *word = '\0';
                ++i;
        }
        val = strtoul (text, NULL, 16);
        if (i < bitmask_size / sizeof(unsigned long))
                bitmask[i] = val;
        else
                log_device_debug(pdev, "Ignoring %s block %lX which is larger than maximum size", attr, val);

        if (test) {
                /* printf pattern with the right unsigned long number of hex chars */
                xsprintf(text, "  bit %%4u: %%0%zulX\n",
                         2 * sizeof(unsigned long));
                log_device_debug(pdev, "%s decoded bit map:", attr);
                val = bitmask_size / sizeof (unsigned long);
                /* skip over leading zeros */
                while (bitmask[val-1] == 0 && val > 0)
                        --val;
                for (i = 0; i < val; ++i) {
                        DISABLE_WARNING_FORMAT_NONLITERAL;
                        log_device_debug(pdev, text, i * BITS_PER_LONG, bitmask[i]);
                        REENABLE_WARNING;
                }
        }
}

/* pointer devices */
static bool test_pointers(sd_device *dev,
                          const unsigned long* bitmask_ev,
                          const unsigned long* bitmask_abs,
                          const unsigned long* bitmask_key,
                          const unsigned long* bitmask_rel,
                          const unsigned long* bitmask_props,
                          bool test) {
        int button, axis;
        bool has_abs_coordinates = false;
        bool has_rel_coordinates = false;
        bool has_mt_coordinates = false;
        bool has_joystick_axes_or_buttons = false;
        bool is_direct = false;
        bool has_touch = false;
        bool has_3d_coordinates = false;
        bool has_keys = false;
        bool stylus_or_pen = false;
        bool finger_but_no_pen = false;
        bool has_mouse_button = false;
        bool is_mouse = false;
        bool is_touchpad = false;
        bool is_touchscreen = false;
        bool is_tablet = false;
        bool is_joystick = false;
        bool is_accelerometer = false;
        bool is_pointing_stick= false;

        has_keys = test_bit(EV_KEY, bitmask_ev);
        has_abs_coordinates = test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs);
        has_3d_coordinates = has_abs_coordinates && test_bit(ABS_Z, bitmask_abs);
        is_accelerometer = test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props);

        if (!has_keys && has_3d_coordinates)
                is_accelerometer = true;

        if (is_accelerometer) {
                udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
                return true;
        }

        is_pointing_stick = test_bit(INPUT_PROP_POINTING_STICK, bitmask_props);
        stylus_or_pen = test_bit(BTN_STYLUS, bitmask_key) || test_bit(BTN_TOOL_PEN, bitmask_key);
        finger_but_no_pen = test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key);
        for (button = BTN_MOUSE; button < BTN_JOYSTICK && !has_mouse_button; button++)
                has_mouse_button = test_bit(button, bitmask_key);
        has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
        has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);

        /* unset has_mt_coordinates if devices claims to have all abs axis */
        if (has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
                has_mt_coordinates = false;
        is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
        has_touch = test_bit(BTN_TOUCH, bitmask_key);

        /* joysticks don't necessarily have buttons; e. g.
         * rudders/pedals are joystick-like, but buttonless; they have
         * other fancy axes. Others have buttons only but no axes.
         *
         * The BTN_JOYSTICK range starts after the mouse range, so a mouse
         * with more than 16 buttons runs into the joystick range (e.g. Mad
         * Catz Mad Catz M.M.O.TE). Skip those.
         */
        if (!test_bit(BTN_JOYSTICK - 1, bitmask_key)) {
                for (button = BTN_JOYSTICK; button < BTN_DIGI && !has_joystick_axes_or_buttons; button++)
                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
                for (button = BTN_TRIGGER_HAPPY1; button <= BTN_TRIGGER_HAPPY40 && !has_joystick_axes_or_buttons; button++)
                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
                for (button = BTN_DPAD_UP; button <= BTN_DPAD_RIGHT && !has_joystick_axes_or_buttons; button++)
                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
        }
        for (axis = ABS_RX; axis < ABS_PRESSURE && !has_joystick_axes_or_buttons; axis++)
                has_joystick_axes_or_buttons = test_bit(axis, bitmask_abs);

        if (has_abs_coordinates) {
                if (stylus_or_pen)
                        is_tablet = true;
                else if (finger_but_no_pen && !is_direct)
                        is_touchpad = true;
                else if (has_mouse_button)
                        /* This path is taken by VMware's USB mouse, which has
                         * absolute axes, but no touch/pressure button. */
                        is_mouse = true;
                else if (has_touch || is_direct)
                        is_touchscreen = true;
                else if (has_joystick_axes_or_buttons)
                        is_joystick = true;
        } else if (has_joystick_axes_or_buttons) {
                is_joystick = true;
        }

        if (has_mt_coordinates) {
                if (stylus_or_pen)
                        is_tablet = true;
                else if (finger_but_no_pen && !is_direct)
                        is_touchpad = true;
                else if (has_touch || is_direct)
                        is_touchscreen = true;
        }

        if (!is_tablet && !is_touchpad && !is_joystick &&
            has_mouse_button &&
            (has_rel_coordinates ||
            !has_abs_coordinates)) /* mouse buttons and no axis */
                is_mouse = true;

        if (is_pointing_stick)
                udev_builtin_add_property(dev, test, "ID_INPUT_POINTINGSTICK", "1");
        if (is_mouse)
                udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
        if (is_touchpad)
                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
        if (is_touchscreen)
                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
        if (is_joystick)
                udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
        if (is_tablet)
                udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");

        return is_tablet || is_mouse || is_touchpad || is_touchscreen || is_joystick || is_pointing_stick;
}

/* key like devices */
static bool test_key(sd_device *dev,
                     const unsigned long* bitmask_ev,
                     const unsigned long* bitmask_key,
                     bool test) {
        unsigned i;
        unsigned long found;
        unsigned long mask;
        bool ret = false;

        /* do we have any KEY_* capability? */
        if (!test_bit(EV_KEY, bitmask_ev)) {
                log_device_debug(dev, "test_key: no EV_KEY capability");
                return false;
        }

        /* only consider KEY_* here, not BTN_* */
        found = 0;
        for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
                found |= bitmask_key[i];
                log_device_debug(dev, "test_key: checking bit block %lu for any keys; found=%i", (unsigned long)i*BITS_PER_LONG, found > 0);
        }
        /* If there are no keys in the lower block, check the higher blocks */
        if (!found) {
                unsigned block;
                for (block = 0; block < (sizeof(high_key_blocks) / sizeof(struct range)); ++block) {
                        for (i = high_key_blocks[block].start; i < high_key_blocks[block].end; ++i) {
                                if (test_bit(i, bitmask_key)) {
                                        log_device_debug(dev, "test_key: Found key %x in high block", i);
                                        found = 1;
                                        break;
                                }
                        }
                }
        }

        if (found > 0) {
                udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
                ret = true;
        }

        /* the first 32 bits are ESC, numbers, and Q to D; if we have all of
         * those, consider it a full keyboard; do not test KEY_RESERVED, though */
        mask = 0xFFFFFFFE;
        if (FLAGS_SET(bitmask_key[0], mask)) {
                udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
                ret = true;
        }

        return ret;
}

static int builtin_input_id(sd_device *dev, int argc, char *argv[], bool test) {
        sd_device *pdev;
        unsigned long bitmask_ev[NBITS(EV_MAX)];
        unsigned long bitmask_abs[NBITS(ABS_MAX)];
        unsigned long bitmask_key[NBITS(KEY_MAX)];
        unsigned long bitmask_rel[NBITS(REL_MAX)];
        unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)];
        const char *sysname, *devnode;
        bool is_pointer;
        bool is_key;

        assert(dev);

        /* walk up the parental chain until we find the real input device; the
         * argument is very likely a subdevice of this, like eventN */
        for (pdev = dev; pdev; ) {
                const char *s;

                if (sd_device_get_sysattr_value(pdev, "capabilities/ev", &s) >= 0)
                        break;

                if (sd_device_get_parent_with_subsystem_devtype(pdev, "input", NULL, &pdev) >= 0)
                        continue;

                pdev = NULL;
                break;
        }

        if (pdev) {
                /* Use this as a flag that input devices were detected, so that this
                 * program doesn't need to be called more than once per device */
                udev_builtin_add_property(dev, test, "ID_INPUT", "1");
                get_cap_mask(pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
                get_cap_mask(pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
                get_cap_mask(pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
                get_cap_mask(pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
                get_cap_mask(pdev, "properties", bitmask_props, sizeof(bitmask_props), test);
                is_pointer = test_pointers(dev, bitmask_ev, bitmask_abs,
                                           bitmask_key, bitmask_rel,
                                           bitmask_props, test);
                is_key = test_key(dev, bitmask_ev, bitmask_key, test);
                /* Some evdev nodes have only a scrollwheel */
                if (!is_pointer && !is_key && test_bit(EV_REL, bitmask_ev) &&
                    (test_bit(REL_WHEEL, bitmask_rel) || test_bit(REL_HWHEEL, bitmask_rel)))
                        udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
                if (test_bit(EV_SW, bitmask_ev))
                        udev_builtin_add_property(dev, test, "ID_INPUT_SWITCH", "1");

        }

        if (sd_device_get_devname(dev, &devnode) >= 0 &&
            sd_device_get_sysname(dev, &sysname) >= 0 &&
            startswith(sysname, "event"))
                extract_info(dev, devnode, test);

        return 0;
}

const UdevBuiltin udev_builtin_input_id = {
        .name = "input_id",
        .cmd = builtin_input_id,
        .help = "Input device properties",
};
Commit	Line	Data
e7145211	1	/* SPDX-License-Identifier: GPL-2.0+ */
d7867b31	2	/*
24447733	3	* expose input properties via udev
d7867b31	4	*
810adae9	5	* Portions Copyright © 2004 David Zeuthen, <david@fubar.dk>
810adae9	6	* Copyright © 2014 Carlos Garnacho <carlosg@gnome.org>
d7867b31 KS	7	*/
d7867b31 KS	8
07630cea	9	#include <errno.h>
f5947a5e	10	#include <fcntl.h>
07630cea	11	#include <stdarg.h>
d7867b31	12	#include <stdlib.h>
07630cea	13	#include <unistd.h>
d7867b31	14	#include <linux/limits.h>
d7867b31	15
d9de38ca	16	#include "device-util.h"
3ffd4af2	17	#include "fd-util.h"
f5947a5e	18	#include "missing_input.h"
d054f0a4	19	#include "stdio-util.h"
07630cea	20	#include "string-util.h"
07a26e42	21	#include "udev-builtin.h"
24447733	22	#include "util.h"
d7867b31 KS	23
	24	/* we must use this kernel-compatible implementation */
	25	#define BITS_PER_LONG (sizeof(unsigned long) * 8)
	26	#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
	27	#define OFF(x) ((x)%BITS_PER_LONG)
	28	#define BIT(x) (1UL<<OFF(x))
	29	#define LONG(x) ((x)/BITS_PER_LONG)
	30	#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
	31
f472d466 NL	32	struct range {
	33	unsigned start;
	34	unsigned end;
	35	};
	36
	37	/* key code ranges above BTN_MISC (start is inclusive, stop is exclusive)*/
	38	static const struct range high_key_blocks[] = {
	39	{ KEY_OK, BTN_DPAD_UP },
	40	{ KEY_ALS_TOGGLE, BTN_TRIGGER_HAPPY }
	41	};
	42
a1e92eee	43	static int abs_size_mm(const struct input_absinfo *absinfo) {
24447733 DH	44	/* Resolution is defined to be in units/mm for ABS_X/Y */
	45	return (absinfo->maximum - absinfo->minimum) / absinfo->resolution;
	46	}
	47
ff799927	48	static void extract_info(sd_device dev, const char devpath, bool test) {
24447733 DH	49	char width[DECIMAL_STR_MAX(int)], height[DECIMAL_STR_MAX(int)];
	50	struct input_absinfo xabsinfo = {}, yabsinfo = {};
	51	_cleanup_close_ int fd = -1;
	52
	53	fd = open(devpath, O_RDONLY\|O_CLOEXEC);
	54	if (fd < 0)
	55	return;
	56
	57	if (ioctl(fd, EVIOCGABS(ABS_X), &xabsinfo) < 0 \|\|
	58	ioctl(fd, EVIOCGABS(ABS_Y), &yabsinfo) < 0)
	59	return;
	60
	61	if (xabsinfo.resolution <= 0 \|\| yabsinfo.resolution <= 0)
	62	return;
	63
d054f0a4 DM	64	xsprintf(width, "%d", abs_size_mm(&xabsinfo));
d054f0a4 DM	65	xsprintf(height, "%d", abs_size_mm(&yabsinfo));
24447733	66
ff799927 YW	67	udev_builtin_add_property(dev, test, "ID_INPUT_WIDTH_MM", width);
ff799927 YW	68	udev_builtin_add_property(dev, test, "ID_INPUT_HEIGHT_MM", height);
24447733 DH	69	}
24447733 DH	70
d7867b31 KS	71	/*
d7867b31 KS	72	* Read a capability attribute and return bitmask.
ff799927	73	* @param dev sd_device
d7867b31 KS	74	* @param attr sysfs attribute name (e. g. "capabilities/key")
	75	* @param bitmask: Output array which has a sizeof of bitmask_size
	76	*/
d9de38ca	77	static void get_cap_mask(sd_device pdev, const char attr,
912541b0	78	unsigned long *bitmask, size_t bitmask_size,
9ec6e95b	79	bool test) {
975a9007	80	const char *v;
912541b0 KS	81	char text[4096];
	82	unsigned i;
	83	char* word;
	84	unsigned long val;
	85
ff799927 YW	86	if (sd_device_get_sysattr_value(pdev, attr, &v) < 0)
ff799927 YW	87	v = "";
975a9007	88
d054f0a4	89	xsprintf(text, "%s", v);
d9de38ca	90	log_device_debug(pdev, "%s raw kernel attribute: %s", attr, text);
912541b0	91
29804cc1	92	memzero(bitmask, bitmask_size);
912541b0 KS	93	i = 0;
912541b0 KS	94	while ((word = strrchr(text, ' ')) != NULL) {
d9de38ca YW	95	val = strtoul(word+1, NULL, 16);
d9de38ca YW	96	if (i < bitmask_size / sizeof(unsigned long))
912541b0 KS	97	bitmask[i] = val;
912541b0 KS	98	else
d9de38ca	99	log_device_debug(pdev, "Ignoring %s block %lX which is larger than maximum size", attr, val);
912541b0 KS	100	*word = '\0';
	101	++i;
	102	}
	103	val = strtoul (text, NULL, 16);
	104	if (i < bitmask_size / sizeof(unsigned long))
	105	bitmask[i] = val;
	106	else
d9de38ca	107	log_device_debug(pdev, "Ignoring %s block %lX which is larger than maximum size", attr, val);
912541b0 KS	108
	109	if (test) {
	110	/* printf pattern with the right unsigned long number of hex chars */
d054f0a4 DM	111	xsprintf(text, " bit %%4u: %%0%zulX\n",
d054f0a4 DM	112	2 * sizeof(unsigned long));
d9de38ca	113	log_device_debug(pdev, "%s decoded bit map:", attr);
912541b0 KS	114	val = bitmask_size / sizeof (unsigned long);
	115	/* skip over leading zeros */
	116	while (bitmask[val-1] == 0 && val > 0)
	117	--val;
bcfce235 LP	118	for (i = 0; i < val; ++i) {
bcfce235 LP	119	DISABLE_WARNING_FORMAT_NONLITERAL;
d9de38ca	120	log_device_debug(pdev, text, i * BITS_PER_LONG, bitmask[i]);
bcfce235 LP	121	REENABLE_WARNING;
bcfce235 LP	122	}
912541b0	123	}
d7867b31 KS	124	}
	125
	126	/* pointer devices */
ff799927	127	static bool test_pointers(sd_device *dev,
b914418a PH	128	const unsigned long* bitmask_ev,
	129	const unsigned long* bitmask_abs,
	130	const unsigned long* bitmask_key,
	131	const unsigned long* bitmask_rel,
	132	const unsigned long* bitmask_props,
	133	bool test) {
22811ad0	134	int button, axis;
15264e5a AP	135	bool has_abs_coordinates = false;
15264e5a AP	136	bool has_rel_coordinates = false;
fa5a113d	137	bool has_mt_coordinates = false;
15264e5a	138	bool has_joystick_axes_or_buttons = false;
fa5a113d	139	bool is_direct = false;
15264e5a AP	140	bool has_touch = false;
	141	bool has_3d_coordinates = false;
	142	bool has_keys = false;
	143	bool stylus_or_pen = false;
	144	bool finger_but_no_pen = false;
	145	bool has_mouse_button = false;
	146	bool is_mouse = false;
	147	bool is_touchpad = false;
	148	bool is_touchscreen = false;
	149	bool is_tablet = false;
	150	bool is_joystick = false;
	151	bool is_accelerometer = false;
	152	bool is_pointing_stick= false;
	153
	154	has_keys = test_bit(EV_KEY, bitmask_ev);
	155	has_abs_coordinates = test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs);
	156	has_3d_coordinates = has_abs_coordinates && test_bit(ABS_Z, bitmask_abs);
	157	is_accelerometer = test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props);
	158
	159	if (!has_keys && has_3d_coordinates)
	160	is_accelerometer = true;
	161
	162	if (is_accelerometer) {
ff799927	163	udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
941a2aca	164	return true;
bd1acc9f HG	165	}
bd1acc9f HG	166
15264e5a AP	167	is_pointing_stick = test_bit(INPUT_PROP_POINTING_STICK, bitmask_props);
	168	stylus_or_pen = test_bit(BTN_STYLUS, bitmask_key) \|\| test_bit(BTN_TOOL_PEN, bitmask_key);
	169	finger_but_no_pen = test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key);
22811ad0 MS	170	for (button = BTN_MOUSE; button < BTN_JOYSTICK && !has_mouse_button; button++)
22811ad0 MS	171	has_mouse_button = test_bit(button, bitmask_key);
15264e5a	172	has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
fa5a113d	173	has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);
495968cf AP	174
495968cf AP	175	/* unset has_mt_coordinates if devices claims to have all abs axis */
9ed794a3	176	if (has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
495968cf	177	has_mt_coordinates = false;
fa5a113d	178	is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
15264e5a	179	has_touch = test_bit(BTN_TOUCH, bitmask_key);
0cd6767c	180
15264e5a AP	181	/* joysticks don't necessarily have buttons; e. g.
15264e5a AP	182	* rudders/pedals are joystick-like, but buttonless; they have
0cd6767c PH	183	* other fancy axes. Others have buttons only but no axes.
	184	*
	185	* The BTN_JOYSTICK range starts after the mouse range, so a mouse
	186	* with more than 16 buttons runs into the joystick range (e.g. Mad
	187	* Catz Mad Catz M.M.O.TE). Skip those.
	188	*/
	189	if (!test_bit(BTN_JOYSTICK - 1, bitmask_key)) {
	190	for (button = BTN_JOYSTICK; button < BTN_DIGI && !has_joystick_axes_or_buttons; button++)
	191	has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
	192	for (button = BTN_TRIGGER_HAPPY1; button <= BTN_TRIGGER_HAPPY40 && !has_joystick_axes_or_buttons; button++)
	193	has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
	194	for (button = BTN_DPAD_UP; button <= BTN_DPAD_RIGHT && !has_joystick_axes_or_buttons; button++)
	195	has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
	196	}
22811ad0 MS	197	for (axis = ABS_RX; axis < ABS_PRESSURE && !has_joystick_axes_or_buttons; axis++)
22811ad0 MS	198	has_joystick_axes_or_buttons = test_bit(axis, bitmask_abs);
15264e5a AP	199
	200	if (has_abs_coordinates) {
	201	if (stylus_or_pen)
	202	is_tablet = true;
fa5a113d	203	else if (finger_but_no_pen && !is_direct)
15264e5a AP	204	is_touchpad = true;
15264e5a AP	205	else if (has_mouse_button)
912541b0 KS	206	/* This path is taken by VMware's USB mouse, which has
912541b0 KS	207	* absolute axes, but no touch/pressure button. */
15264e5a	208	is_mouse = true;
1a3439ef	209	else if (has_touch \|\| is_direct)
15264e5a AP	210	is_touchscreen = true;
	211	else if (has_joystick_axes_or_buttons)
	212	is_joystick = true;
2e856c63 PH	213	} else if (has_joystick_axes_or_buttons) {
2e856c63 PH	214	is_joystick = true;
912541b0	215	}
2e856c63	216
d3a37494 AP	217	if (has_mt_coordinates) {
	218	if (stylus_or_pen)
	219	is_tablet = true;
	220	else if (finger_but_no_pen && !is_direct)
	221	is_touchpad = true;
	222	else if (has_touch \|\| is_direct)
	223	is_touchscreen = true;
	224	}
912541b0	225
774ff9ba PH	226	if (!is_tablet && !is_touchpad && !is_joystick &&
774ff9ba PH	227	has_mouse_button &&
0c21944e MS	228	(has_rel_coordinates \|\|
0c21944e MS	229	!has_abs_coordinates)) /* mouse buttons and no axis */
15264e5a	230	is_mouse = true;
912541b0	231
15264e5a	232	if (is_pointing_stick)
ff799927	233	udev_builtin_add_property(dev, test, "ID_INPUT_POINTINGSTICK", "1");
15264e5a	234	if (is_mouse)
ff799927	235	udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
15264e5a	236	if (is_touchpad)
ff799927	237	udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
15264e5a	238	if (is_touchscreen)
ff799927	239	udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
15264e5a	240	if (is_joystick)
ff799927	241	udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
15264e5a	242	if (is_tablet)
ff799927	243	udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");
15264e5a AP	244
15264e5a AP	245	return is_tablet \|\| is_mouse \|\| is_touchpad \|\| is_touchscreen \|\| is_joystick \|\| is_pointing_stick;
d7867b31 KS	246	}
	247
	248	/* key like devices */
ff799927	249	static bool test_key(sd_device *dev,
b914418a PH	250	const unsigned long* bitmask_ev,
	251	const unsigned long* bitmask_key,
	252	bool test) {
912541b0 KS	253	unsigned i;
	254	unsigned long found;
	255	unsigned long mask;
941a2aca	256	bool ret = false;
912541b0 KS	257
912541b0 KS	258	/* do we have any KEY_* capability? */
b914418a	259	if (!test_bit(EV_KEY, bitmask_ev)) {
d9de38ca	260	log_device_debug(dev, "test_key: no EV_KEY capability");
941a2aca	261	return false;
912541b0 KS	262	}
	263
	264	/* only consider KEY_* here, not BTN_* */
	265	found = 0;
	266	for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
	267	found \|= bitmask_key[i];
d9de38ca	268	log_device_debug(dev, "test_key: checking bit block %lu for any keys; found=%i", (unsigned long)i*BITS_PER_LONG, found > 0);
912541b0	269	}
f472d466	270	/* If there are no keys in the lower block, check the higher blocks */
912541b0	271	if (!found) {
f472d466 NL	272	unsigned block;
	273	for (block = 0; block < (sizeof(high_key_blocks) / sizeof(struct range)); ++block) {
	274	for (i = high_key_blocks[block].start; i < high_key_blocks[block].end; ++i) {
	275	if (test_bit(i, bitmask_key)) {
d9de38ca	276	log_device_debug(dev, "test_key: Found key %x in high block", i);
f472d466 NL	277	found = 1;
	278	break;
	279	}
912541b0 KS	280	}
	281	}
	282	}
	283
941a2aca	284	if (found > 0) {
ff799927	285	udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
941a2aca HG	286	ret = true;
941a2aca HG	287	}
912541b0 KS	288
	289	/* the first 32 bits are ESC, numbers, and Q to D; if we have all of
	290	* those, consider it a full keyboard; do not test KEY_RESERVED, though */
	291	mask = 0xFFFFFFFE;
d94a24ca	292	if (FLAGS_SET(bitmask_key[0], mask)) {
ff799927	293	udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
941a2aca HG	294	ret = true;
	295	}
	296
	297	return ret;
d7867b31 KS	298	}
d7867b31 KS	299
3fc2e9a2 YW	300	static int builtin_input_id(sd_device dev, int argc, char argv[], bool test) {
3fc2e9a2 YW	301	sd_device *pdev;
912541b0 KS	302	unsigned long bitmask_ev[NBITS(EV_MAX)];
	303	unsigned long bitmask_abs[NBITS(ABS_MAX)];
	304	unsigned long bitmask_key[NBITS(KEY_MAX)];
	305	unsigned long bitmask_rel[NBITS(REL_MAX)];
606df97b	306	unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)];
24447733	307	const char sysname, devnode;
37186823 HG	308	bool is_pointer;
37186823 HG	309	bool is_key;
912541b0	310
3b64e4d4 TG	311	assert(dev);
3b64e4d4 TG	312
912541b0 KS	313	/* walk up the parental chain until we find the real input device; the
912541b0 KS	314	* argument is very likely a subdevice of this, like eventN */
ff799927 YW	315	for (pdev = dev; pdev; ) {
	316	const char *s;
	317
	318	if (sd_device_get_sysattr_value(pdev, "capabilities/ev", &s) >= 0)
	319	break;
	320
	321	if (sd_device_get_parent_with_subsystem_devtype(pdev, "input", NULL, &pdev) >= 0)
	322	continue;
	323
	324	pdev = NULL;
	325	break;
	326	}
912541b0	327
24447733 DH	328	if (pdev) {
	329	/* Use this as a flag that input devices were detected, so that this
	330	* program doesn't need to be called more than once per device */
ff799927	331	udev_builtin_add_property(dev, test, "ID_INPUT", "1");
d9de38ca YW	332	get_cap_mask(pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
	333	get_cap_mask(pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
	334	get_cap_mask(pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
	335	get_cap_mask(pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
	336	get_cap_mask(pdev, "properties", bitmask_props, sizeof(bitmask_props), test);
37186823 HG	337	is_pointer = test_pointers(dev, bitmask_ev, bitmask_abs,
	338	bitmask_key, bitmask_rel,
	339	bitmask_props, test);
	340	is_key = test_key(dev, bitmask_ev, bitmask_key, test);
	341	/* Some evdev nodes have only a scrollwheel */
	342	if (!is_pointer && !is_key && test_bit(EV_REL, bitmask_ev) &&
	343	(test_bit(REL_WHEEL, bitmask_rel) \|\| test_bit(REL_HWHEEL, bitmask_rel)))
ff799927	344	udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
64083a60	345	if (test_bit(EV_SW, bitmask_ev))
ff799927	346	udev_builtin_add_property(dev, test, "ID_INPUT_SWITCH", "1");
64083a60	347
24447733 DH	348	}
24447733 DH	349
ff799927 YW	350	if (sd_device_get_devname(dev, &devnode) >= 0 &&
	351	sd_device_get_sysname(dev, &sysname) >= 0 &&
	352	startswith(sysname, "event"))
24447733 DH	353	extract_info(dev, devnode, test);
24447733 DH	354
d354690e	355	return 0;
d7867b31 KS	356	}
d7867b31 KS	357
25de7aa7	358	const UdevBuiltin udev_builtin_input_id = {
912541b0 KS	359	.name = "input_id",
912541b0 KS	360	.cmd = builtin_input_id,
5ac0162c	361	.help = "Input device properties",
d7867b31	362	};