[mirror_qemu.git] / ui / input-linux.c

/*
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * (at your option) any later version.  See the COPYING file in the
 * top-level directory.
 */

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/config-file.h"
#include "qemu/sockets.h"
#include "sysemu/sysemu.h"
#include "ui/input.h"

#include <sys/ioctl.h>
#include "standard-headers/linux/input.h"

static int linux_to_qcode[KEY_CNT] = {
    [KEY_ESC]            = Q_KEY_CODE_ESC,
    [KEY_1]              = Q_KEY_CODE_1,
    [KEY_2]              = Q_KEY_CODE_2,
    [KEY_3]              = Q_KEY_CODE_3,
    [KEY_4]              = Q_KEY_CODE_4,
    [KEY_5]              = Q_KEY_CODE_5,
    [KEY_6]              = Q_KEY_CODE_6,
    [KEY_7]              = Q_KEY_CODE_7,
    [KEY_8]              = Q_KEY_CODE_8,
    [KEY_9]              = Q_KEY_CODE_9,
    [KEY_0]              = Q_KEY_CODE_0,
    [KEY_MINUS]          = Q_KEY_CODE_MINUS,
    [KEY_EQUAL]          = Q_KEY_CODE_EQUAL,
    [KEY_BACKSPACE]      = Q_KEY_CODE_BACKSPACE,
    [KEY_TAB]            = Q_KEY_CODE_TAB,
    [KEY_Q]              = Q_KEY_CODE_Q,
    [KEY_W]              = Q_KEY_CODE_W,
    [KEY_E]              = Q_KEY_CODE_E,
    [KEY_R]              = Q_KEY_CODE_R,
    [KEY_T]              = Q_KEY_CODE_T,
    [KEY_Y]              = Q_KEY_CODE_Y,
    [KEY_U]              = Q_KEY_CODE_U,
    [KEY_I]              = Q_KEY_CODE_I,
    [KEY_O]              = Q_KEY_CODE_O,
    [KEY_P]              = Q_KEY_CODE_P,
    [KEY_LEFTBRACE]      = Q_KEY_CODE_BRACKET_LEFT,
    [KEY_RIGHTBRACE]     = Q_KEY_CODE_BRACKET_RIGHT,
    [KEY_ENTER]          = Q_KEY_CODE_RET,
    [KEY_LEFTCTRL]       = Q_KEY_CODE_CTRL,
    [KEY_A]              = Q_KEY_CODE_A,
    [KEY_S]              = Q_KEY_CODE_S,
    [KEY_D]              = Q_KEY_CODE_D,
    [KEY_F]              = Q_KEY_CODE_F,
    [KEY_G]              = Q_KEY_CODE_G,
    [KEY_H]              = Q_KEY_CODE_H,
    [KEY_J]              = Q_KEY_CODE_J,
    [KEY_K]              = Q_KEY_CODE_K,
    [KEY_L]              = Q_KEY_CODE_L,
    [KEY_SEMICOLON]      = Q_KEY_CODE_SEMICOLON,
    [KEY_APOSTROPHE]     = Q_KEY_CODE_APOSTROPHE,
    [KEY_GRAVE]          = Q_KEY_CODE_GRAVE_ACCENT,
    [KEY_LEFTSHIFT]      = Q_KEY_CODE_SHIFT,
    [KEY_BACKSLASH]      = Q_KEY_CODE_BACKSLASH,
    [KEY_102ND]          = Q_KEY_CODE_LESS,
    [KEY_Z]              = Q_KEY_CODE_Z,
    [KEY_X]              = Q_KEY_CODE_X,
    [KEY_C]              = Q_KEY_CODE_C,
    [KEY_V]              = Q_KEY_CODE_V,
    [KEY_B]              = Q_KEY_CODE_B,
    [KEY_N]              = Q_KEY_CODE_N,
    [KEY_M]              = Q_KEY_CODE_M,
    [KEY_COMMA]          = Q_KEY_CODE_COMMA,
    [KEY_DOT]            = Q_KEY_CODE_DOT,
    [KEY_SLASH]          = Q_KEY_CODE_SLASH,
    [KEY_RIGHTSHIFT]     = Q_KEY_CODE_SHIFT_R,
    [KEY_LEFTALT]        = Q_KEY_CODE_ALT,
    [KEY_SPACE]          = Q_KEY_CODE_SPC,
    [KEY_CAPSLOCK]       = Q_KEY_CODE_CAPS_LOCK,
    [KEY_F1]             = Q_KEY_CODE_F1,
    [KEY_F2]             = Q_KEY_CODE_F2,
    [KEY_F3]             = Q_KEY_CODE_F3,
    [KEY_F4]             = Q_KEY_CODE_F4,
    [KEY_F5]             = Q_KEY_CODE_F5,
    [KEY_F6]             = Q_KEY_CODE_F6,
    [KEY_F7]             = Q_KEY_CODE_F7,
    [KEY_F8]             = Q_KEY_CODE_F8,
    [KEY_F9]             = Q_KEY_CODE_F9,
    [KEY_F10]            = Q_KEY_CODE_F10,
    [KEY_NUMLOCK]        = Q_KEY_CODE_NUM_LOCK,
    [KEY_SCROLLLOCK]     = Q_KEY_CODE_SCROLL_LOCK,
    [KEY_KP0]            = Q_KEY_CODE_KP_0,
    [KEY_KP1]            = Q_KEY_CODE_KP_1,
    [KEY_KP2]            = Q_KEY_CODE_KP_2,
    [KEY_KP3]            = Q_KEY_CODE_KP_3,
    [KEY_KP4]            = Q_KEY_CODE_KP_4,
    [KEY_KP5]            = Q_KEY_CODE_KP_5,
    [KEY_KP6]            = Q_KEY_CODE_KP_6,
    [KEY_KP7]            = Q_KEY_CODE_KP_7,
    [KEY_KP8]            = Q_KEY_CODE_KP_8,
    [KEY_KP9]            = Q_KEY_CODE_KP_9,
    [KEY_KPMINUS]        = Q_KEY_CODE_KP_SUBTRACT,
    [KEY_KPPLUS]         = Q_KEY_CODE_KP_ADD,
    [KEY_KPDOT]          = Q_KEY_CODE_KP_DECIMAL,
    [KEY_KPENTER]        = Q_KEY_CODE_KP_ENTER,
    [KEY_KPSLASH]        = Q_KEY_CODE_KP_DIVIDE,
    [KEY_KPASTERISK]     = Q_KEY_CODE_KP_MULTIPLY,
    [KEY_F11]            = Q_KEY_CODE_F11,
    [KEY_F12]            = Q_KEY_CODE_F12,
    [KEY_RIGHTCTRL]      = Q_KEY_CODE_CTRL_R,
    [KEY_SYSRQ]          = Q_KEY_CODE_SYSRQ,
    [KEY_RIGHTALT]       = Q_KEY_CODE_ALT_R,
    [KEY_HOME]           = Q_KEY_CODE_HOME,
    [KEY_UP]             = Q_KEY_CODE_UP,
    [KEY_PAGEUP]         = Q_KEY_CODE_PGUP,
    [KEY_LEFT]           = Q_KEY_CODE_LEFT,
    [KEY_RIGHT]          = Q_KEY_CODE_RIGHT,
    [KEY_END]            = Q_KEY_CODE_END,
    [KEY_DOWN]           = Q_KEY_CODE_DOWN,
    [KEY_PAGEDOWN]       = Q_KEY_CODE_PGDN,
    [KEY_INSERT]         = Q_KEY_CODE_INSERT,
    [KEY_DELETE]         = Q_KEY_CODE_DELETE,
    [KEY_LEFTMETA]       = Q_KEY_CODE_META_L,
    [KEY_RIGHTMETA]      = Q_KEY_CODE_META_R,
    [KEY_MENU]           = Q_KEY_CODE_MENU,
};

static int qemu_input_linux_to_qcode(unsigned int lnx)
{
    assert(lnx < KEY_CNT);
    return linux_to_qcode[lnx];
}

typedef struct InputLinux InputLinux;

struct InputLinux {
    const char  *evdev;
    int         fd;
    bool        grab_request;
    bool        grab_active;
    bool        keydown[KEY_CNT];
    int         keycount;
    int         wheel;
};

static void input_linux_toggle_grab(InputLinux *il)
{
    intptr_t request = !il->grab_active;
    int rc;

    rc = ioctl(il->fd, EVIOCGRAB, request);
    if (rc < 0) {
        return;
    }
    il->grab_active = !il->grab_active;
}

static void input_linux_event_keyboard(void *opaque)
{
    InputLinux *il = opaque;
    struct input_event event;
    int rc;

    for (;;) {
        rc = read(il->fd, &event, sizeof(event));
        if (rc != sizeof(event)) {
            if (rc < 0 && errno != EAGAIN) {
                fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
                qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
                close(il->fd);
            }
            break;
        }

        switch (event.type) {
        case EV_KEY:
            if (event.value > 1) {
                /*
                 * ignore autorepeat + unknown key events
                 * 0 == up, 1 == down, 2 == autorepeat, other == undefined
                 */
                continue;
            }
            /* keep track of key state */
            if (!il->keydown[event.code] && event.value) {
                il->keydown[event.code] = true;
                il->keycount++;
            }
            if (il->keydown[event.code] && !event.value) {
                il->keydown[event.code] = false;
                il->keycount--;
            }

            /* send event to guest when grab is active */
            if (il->grab_active) {
                int qcode = qemu_input_linux_to_qcode(event.code);
                qemu_input_event_send_key_qcode(NULL, qcode, event.value);
            }

            /* hotkey -> record switch request ... */
            if (il->keydown[KEY_LEFTCTRL] &&
                il->keydown[KEY_RIGHTCTRL]) {
                il->grab_request = true;
            }

            /*
             * ... and do the switch when all keys are lifted, so we
             * confuse neither guest nor host with keys which seem to
             * be stuck due to missing key-up events.
             */
            if (il->grab_request && !il->keycount) {
                il->grab_request = false;
                input_linux_toggle_grab(il);
            }
            break;
        }
    }
}

static void input_linux_event_mouse_button(int button)
{
    qemu_input_queue_btn(NULL, button, true);
    qemu_input_event_sync();
    qemu_input_queue_btn(NULL, button, false);
    qemu_input_event_sync();
}

static void input_linux_event_mouse(void *opaque)
{
    InputLinux *il = opaque;
    struct input_event event;
    int rc;

    for (;;) {
        rc = read(il->fd, &event, sizeof(event));
        if (rc != sizeof(event)) {
            if (rc < 0 && errno != EAGAIN) {
                fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
                qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
                close(il->fd);
            }
            break;
        }

        switch (event.type) {
        case EV_KEY:
            switch (event.code) {
            case BTN_LEFT:
                qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event.value);
                break;
            case BTN_RIGHT:
                qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event.value);
                break;
            case BTN_MIDDLE:
                qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event.value);
                break;
            case BTN_GEAR_UP:
                qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event.value);
                break;
            case BTN_GEAR_DOWN:
                qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN,
                                     event.value);
                break;
            };
            break;
        case EV_REL:
            switch (event.code) {
            case REL_X:
                qemu_input_queue_rel(NULL, INPUT_AXIS_X, event.value);
                break;
            case REL_Y:
                qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event.value);
                break;
            case REL_WHEEL:
                il->wheel = event.value;
                break;
            }
            break;
        case EV_SYN:
            qemu_input_event_sync();
            if (il->wheel != 0) {
                input_linux_event_mouse_button((il->wheel > 0)
                                               ? INPUT_BUTTON_WHEEL_UP
                                               : INPUT_BUTTON_WHEEL_DOWN);
                il->wheel = 0;
            }
            break;
        }
    }
}

int input_linux_init(void *opaque, QemuOpts *opts, Error **errp)
{
    InputLinux *il = g_new0(InputLinux, 1);
    uint32_t evtmap;
    int rc, ver;

    il->evdev = qemu_opt_get(opts, "evdev");
    if (!il->evdev) {
        error_setg(errp, "no input device specified");
        goto err_free;
    }

    il->fd = open(il->evdev, O_RDWR);
    if (il->fd < 0)  {
        error_setg_file_open(errp, errno, il->evdev);
        goto err_free;
    }
    qemu_set_nonblock(il->fd);

    rc = ioctl(il->fd, EVIOCGVERSION, &ver);
    if (rc < 0) {
        error_setg(errp, "%s: is not an evdev device", il->evdev);
        goto err_close;
    }

    rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);

    if (evtmap & (1 << EV_REL)) {
        /* has relative axis -> assume mouse */
        qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il);
    } else if (evtmap & (1 << EV_ABS)) {
        /* has absolute axis -> not supported */
        error_setg(errp, "tablet/touchscreen not supported");
        goto err_close;
    } else if (evtmap & (1 << EV_KEY)) {
        /* has keys/buttons (and no axis) -> assume keyboard */
        qemu_set_fd_handler(il->fd, input_linux_event_keyboard, NULL, il);
    } else {
        /* Huh? What is this? */
        error_setg(errp, "unknown kind of input device");
        goto err_close;
    }
    input_linux_toggle_grab(il);
    return 0;

err_close:
    close(il->fd);
err_free:
    g_free(il);
    return -1;
}

static QemuOptsList qemu_input_linux_opts = {
    .name = "input-linux",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_input_linux_opts.head),
    .implied_opt_name = "evdev",
    .desc = {
        {
            .name = "evdev",
            .type = QEMU_OPT_STRING,
        },
        { /* end of list */ }
    },
};

static void input_linux_register_config(void)
{
    qemu_add_opts(&qemu_input_linux_opts);
}
machine_init(input_linux_register_config);
Commit	Line	Data
e0d2bd51 GH	1	/*
	2	* This work is licensed under the terms of the GNU GPL, version 2 or
	3	* (at your option) any later version. See the COPYING file in the
	4	* top-level directory.
	5	*/
	6
	7	#include "qemu/osdep.h"
	8	#include "qemu-common.h"
	9	#include "qemu/config-file.h"
	10	#include "qemu/sockets.h"
	11	#include "sysemu/sysemu.h"
	12	#include "ui/input.h"
	13
	14	#include <sys/ioctl.h>
	15	#include "standard-headers/linux/input.h"
	16
	17	static int linux_to_qcode[KEY_CNT] = {
	18	[KEY_ESC] = Q_KEY_CODE_ESC,
	19	[KEY_1] = Q_KEY_CODE_1,
	20	[KEY_2] = Q_KEY_CODE_2,
	21	[KEY_3] = Q_KEY_CODE_3,
	22	[KEY_4] = Q_KEY_CODE_4,
	23	[KEY_5] = Q_KEY_CODE_5,
	24	[KEY_6] = Q_KEY_CODE_6,
	25	[KEY_7] = Q_KEY_CODE_7,
	26	[KEY_8] = Q_KEY_CODE_8,
	27	[KEY_9] = Q_KEY_CODE_9,
	28	[KEY_0] = Q_KEY_CODE_0,
	29	[KEY_MINUS] = Q_KEY_CODE_MINUS,
	30	[KEY_EQUAL] = Q_KEY_CODE_EQUAL,
	31	[KEY_BACKSPACE] = Q_KEY_CODE_BACKSPACE,
	32	[KEY_TAB] = Q_KEY_CODE_TAB,
	33	[KEY_Q] = Q_KEY_CODE_Q,
	34	[KEY_W] = Q_KEY_CODE_W,
	35	[KEY_E] = Q_KEY_CODE_E,
	36	[KEY_R] = Q_KEY_CODE_R,
	37	[KEY_T] = Q_KEY_CODE_T,
	38	[KEY_Y] = Q_KEY_CODE_Y,
	39	[KEY_U] = Q_KEY_CODE_U,
	40	[KEY_I] = Q_KEY_CODE_I,
	41	[KEY_O] = Q_KEY_CODE_O,
	42	[KEY_P] = Q_KEY_CODE_P,
	43	[KEY_LEFTBRACE] = Q_KEY_CODE_BRACKET_LEFT,
	44	[KEY_RIGHTBRACE] = Q_KEY_CODE_BRACKET_RIGHT,
	45	[KEY_ENTER] = Q_KEY_CODE_RET,
	46	[KEY_LEFTCTRL] = Q_KEY_CODE_CTRL,
	47	[KEY_A] = Q_KEY_CODE_A,
	48	[KEY_S] = Q_KEY_CODE_S,
	49	[KEY_D] = Q_KEY_CODE_D,
	50	[KEY_F] = Q_KEY_CODE_F,
	51	[KEY_G] = Q_KEY_CODE_G,
	52	[KEY_H] = Q_KEY_CODE_H,
	53	[KEY_J] = Q_KEY_CODE_J,
	54	[KEY_K] = Q_KEY_CODE_K,
	55	[KEY_L] = Q_KEY_CODE_L,
	56	[KEY_SEMICOLON] = Q_KEY_CODE_SEMICOLON,
	57	[KEY_APOSTROPHE] = Q_KEY_CODE_APOSTROPHE,
	58	[KEY_GRAVE] = Q_KEY_CODE_GRAVE_ACCENT,
	59	[KEY_LEFTSHIFT] = Q_KEY_CODE_SHIFT,
	60	[KEY_BACKSLASH] = Q_KEY_CODE_BACKSLASH,
	61	[KEY_102ND] = Q_KEY_CODE_LESS,
	62	[KEY_Z] = Q_KEY_CODE_Z,
	63	[KEY_X] = Q_KEY_CODE_X,
	64	[KEY_C] = Q_KEY_CODE_C,
65	[KEY_V] = Q_KEY_CODE_V,
66	[KEY_B] = Q_KEY_CODE_B,
67	[KEY_N] = Q_KEY_CODE_N,
68	[KEY_M] = Q_KEY_CODE_M,
69	[KEY_COMMA] = Q_KEY_CODE_COMMA,
70	[KEY_DOT] = Q_KEY_CODE_DOT,
71	[KEY_SLASH] = Q_KEY_CODE_SLASH,
72	[KEY_RIGHTSHIFT] = Q_KEY_CODE_SHIFT_R,
73	[KEY_LEFTALT] = Q_KEY_CODE_ALT,
74	[KEY_SPACE] = Q_KEY_CODE_SPC,
75	[KEY_CAPSLOCK] = Q_KEY_CODE_CAPS_LOCK,
76	[KEY_F1] = Q_KEY_CODE_F1,
77	[KEY_F2] = Q_KEY_CODE_F2,
78	[KEY_F3] = Q_KEY_CODE_F3,
79	[KEY_F4] = Q_KEY_CODE_F4,
80	[KEY_F5] = Q_KEY_CODE_F5,
81	[KEY_F6] = Q_KEY_CODE_F6,
82	[KEY_F7] = Q_KEY_CODE_F7,
83	[KEY_F8] = Q_KEY_CODE_F8,
84	[KEY_F9] = Q_KEY_CODE_F9,
85	[KEY_F10] = Q_KEY_CODE_F10,
86	[KEY_NUMLOCK] = Q_KEY_CODE_NUM_LOCK,
87	[KEY_SCROLLLOCK] = Q_KEY_CODE_SCROLL_LOCK,
88	[KEY_KP0] = Q_KEY_CODE_KP_0,
89	[KEY_KP1] = Q_KEY_CODE_KP_1,
90	[KEY_KP2] = Q_KEY_CODE_KP_2,
91	[KEY_KP3] = Q_KEY_CODE_KP_3,
92	[KEY_KP4] = Q_KEY_CODE_KP_4,
93	[KEY_KP5] = Q_KEY_CODE_KP_5,
94	[KEY_KP6] = Q_KEY_CODE_KP_6,
95	[KEY_KP7] = Q_KEY_CODE_KP_7,
96	[KEY_KP8] = Q_KEY_CODE_KP_8,
97	[KEY_KP9] = Q_KEY_CODE_KP_9,
98	[KEY_KPMINUS] = Q_KEY_CODE_KP_SUBTRACT,
99	[KEY_KPPLUS] = Q_KEY_CODE_KP_ADD,
100	[KEY_KPDOT] = Q_KEY_CODE_KP_DECIMAL,
101	[KEY_KPENTER] = Q_KEY_CODE_KP_ENTER,
102	[KEY_KPSLASH] = Q_KEY_CODE_KP_DIVIDE,
103	[KEY_KPASTERISK] = Q_KEY_CODE_KP_MULTIPLY,
104	[KEY_F11] = Q_KEY_CODE_F11,
105	[KEY_F12] = Q_KEY_CODE_F12,
106	[KEY_RIGHTCTRL] = Q_KEY_CODE_CTRL_R,
107	[KEY_SYSRQ] = Q_KEY_CODE_SYSRQ,
108	[KEY_RIGHTALT] = Q_KEY_CODE_ALT_R,
109	[KEY_HOME] = Q_KEY_CODE_HOME,
110	[KEY_UP] = Q_KEY_CODE_UP,
111	[KEY_PAGEUP] = Q_KEY_CODE_PGUP,
112	[KEY_LEFT] = Q_KEY_CODE_LEFT,
113	[KEY_RIGHT] = Q_KEY_CODE_RIGHT,
114	[KEY_END] = Q_KEY_CODE_END,
115	[KEY_DOWN] = Q_KEY_CODE_DOWN,
116	[KEY_PAGEDOWN] = Q_KEY_CODE_PGDN,
117	[KEY_INSERT] = Q_KEY_CODE_INSERT,
118	[KEY_DELETE] = Q_KEY_CODE_DELETE,
119	[KEY_LEFTMETA] = Q_KEY_CODE_META_L,
120	[KEY_RIGHTMETA] = Q_KEY_CODE_META_R,
121	[KEY_MENU] = Q_KEY_CODE_MENU,
122	};
123
124	static int qemu_input_linux_to_qcode(unsigned int lnx)
125	{
126	assert(lnx < KEY_CNT);
127	return linux_to_qcode[lnx];
128	}
129
130	typedef struct InputLinux InputLinux;
131
132	struct InputLinux {
133	const char *evdev;
134	int fd;
135	bool grab_request;
136	bool grab_active;
137	bool keydown[KEY_CNT];
138	int keycount;
139	int wheel;
140	};
141
142	static void input_linux_toggle_grab(InputLinux *il)
143	{
144	intptr_t request = !il->grab_active;
145	int rc;
146
147	rc = ioctl(il->fd, EVIOCGRAB, request);
148	if (rc < 0) {
149	return;
150	}
151	il->grab_active = !il->grab_active;
152	}
153
154	static void input_linux_event_keyboard(void *opaque)
155	{
156	InputLinux *il = opaque;
157	struct input_event event;
158	int rc;
159
160	for (;;) {
161	rc = read(il->fd, &event, sizeof(event));
162	if (rc != sizeof(event)) {
163	if (rc < 0 && errno != EAGAIN) {
164	fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
165	qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
166	close(il->fd);
167	}
168	break;
169	}
170
171	switch (event.type) {
172	case EV_KEY:
173	if (event.value > 1) {
174	/*
175	* ignore autorepeat + unknown key events
176	* 0 == up, 1 == down, 2 == autorepeat, other == undefined
177	*/
178	continue;
179	}
180	/* keep track of key state */
181	if (!il->keydown[event.code] && event.value) {
182	il->keydown[event.code] = true;
183	il->keycount++;
184	}
185	if (il->keydown[event.code] && !event.value) {
186	il->keydown[event.code] = false;
187	il->keycount--;
188	}
189
190	/* send event to guest when grab is active */
191	if (il->grab_active) {
192	int qcode = qemu_input_linux_to_qcode(event.code);
193	qemu_input_event_send_key_qcode(NULL, qcode, event.value);
194	}
195
196	/* hotkey -> record switch request ... */
197	if (il->keydown[KEY_LEFTCTRL] &&
198	il->keydown[KEY_RIGHTCTRL]) {
199	il->grab_request = true;
200	}
201
202	/*
203	* ... and do the switch when all keys are lifted, so we
204	* confuse neither guest nor host with keys which seem to
205	* be stuck due to missing key-up events.
206	*/
207	if (il->grab_request && !il->keycount) {
208	il->grab_request = false;
209	input_linux_toggle_grab(il);
210	}
211	break;
212	}
213	}
214	}
215
216	static void input_linux_event_mouse_button(int button)
217	{
218	qemu_input_queue_btn(NULL, button, true);
219	qemu_input_event_sync();
220	qemu_input_queue_btn(NULL, button, false);
221	qemu_input_event_sync();
222	}
223
224	static void input_linux_event_mouse(void *opaque)
225	{
226	InputLinux *il = opaque;
227	struct input_event event;
228	int rc;
229
230	for (;;) {
231	rc = read(il->fd, &event, sizeof(event));
232	if (rc != sizeof(event)) {
233	if (rc < 0 && errno != EAGAIN) {
234	fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
235	qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
236	close(il->fd);
237	}
238	break;
239	}
240
241	switch (event.type) {
242	case EV_KEY:
243	switch (event.code) {
244	case BTN_LEFT:
245	qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event.value);
246	break;
247	case BTN_RIGHT:
248	qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event.value);
249	break;
250	case BTN_MIDDLE:
251	qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event.value);
252	break;
253	case BTN_GEAR_UP:
254	qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event.value);
255	break;
256	case BTN_GEAR_DOWN:
257	qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN,
258	event.value);
259	break;
260	};
261	break;
262	case EV_REL:
263	switch (event.code) {
264	case REL_X:
265	qemu_input_queue_rel(NULL, INPUT_AXIS_X, event.value);
266	break;
267	case REL_Y:
268	qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event.value);
269	break;
270	case REL_WHEEL:
271	il->wheel = event.value;
272	break;
273	}
274	break;
275	case EV_SYN:
276	qemu_input_event_sync();
277	if (il->wheel != 0) {
278	input_linux_event_mouse_button((il->wheel > 0)
279	? INPUT_BUTTON_WHEEL_UP
280	: INPUT_BUTTON_WHEEL_DOWN);
281	il->wheel = 0;
282	}
283	break;
284	}
285	}
286	}
287
288	int input_linux_init(void opaque, QemuOpts opts, Error **errp)
289	{
290	InputLinux *il = g_new0(InputLinux, 1);
291	uint32_t evtmap;
292	int rc, ver;
293
294	il->evdev = qemu_opt_get(opts, "evdev");
295	if (!il->evdev) {
296	error_setg(errp, "no input device specified");
297	goto err_free;
298	}
299
300	il->fd = open(il->evdev, O_RDWR);
301	if (il->fd < 0) {
302	error_setg_file_open(errp, errno, il->evdev);
303	goto err_free;
304	}
305	qemu_set_nonblock(il->fd);
306
307	rc = ioctl(il->fd, EVIOCGVERSION, &ver);
308	if (rc < 0) {
309	error_setg(errp, "%s: is not an evdev device", il->evdev);
310	goto err_close;
311	}
312
313	rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);
314
315	if (evtmap & (1 << EV_REL)) {
316	/* has relative axis -> assume mouse */
317	qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il);
318	} else if (evtmap & (1 << EV_ABS)) {
319	/* has absolute axis -> not supported */
320	error_setg(errp, "tablet/touchscreen not supported");
321	goto err_close;
322	} else if (evtmap & (1 << EV_KEY)) {
323	/* has keys/buttons (and no axis) -> assume keyboard */
324	qemu_set_fd_handler(il->fd, input_linux_event_keyboard, NULL, il);
325	} else {
326	/* Huh? What is this? */
327	error_setg(errp, "unknown kind of input device");
328	goto err_close;
329	}
330	input_linux_toggle_grab(il);
331	return 0;
332
333	err_close:
334	close(il->fd);
335	err_free:
336	g_free(il);
337	return -1;
338	}
339
340	static QemuOptsList qemu_input_linux_opts = {
341	.name = "input-linux",
342	.head = QTAILQ_HEAD_INITIALIZER(qemu_input_linux_opts.head),
343	.implied_opt_name = "evdev",
344	.desc = {
345	{
346	.name = "evdev",
347	.type = QEMU_OPT_STRING,
348	},
349	{ /* end of list */ }
350	},
351	};
352
353	static void input_linux_register_config(void)
354	{
355	qemu_add_opts(&qemu_input_linux_opts);
356	}
357	machine_init(input_linux_register_config);