diff options
Diffstat (limited to 'ui/input-linux.c')
| -rw-r--r-- | ui/input-linux.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/ui/input-linux.c b/ui/input-linux.c new file mode 100644 index 0000000000..5374a2e8e5 --- /dev/null +++ b/ui/input-linux.c @@ -0,0 +1,357 @@ +/* + * 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); |