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-rw-r--r--ui/input-linux.c269
1 files changed, 140 insertions, 129 deletions
diff --git a/ui/input-linux.c b/ui/input-linux.c
index 1d33b5c121..0e230ce699 100644
--- a/ui/input-linux.c
+++ b/ui/input-linux.c
@@ -129,6 +129,17 @@ static int qemu_input_linux_to_qcode(unsigned int lnx)
return linux_to_qcode[lnx];
}
+static bool linux_is_button(unsigned int lnx)
+{
+ if (lnx < 0x100) {
+ return false;
+ }
+ if (lnx >= 0x160 && lnx < 0x2c0) {
+ return false;
+ }
+ return true;
+}
+
#define TYPE_INPUT_LINUX "input-linux"
#define INPUT_LINUX(obj) \
OBJECT_CHECK(InputLinux, (obj), TYPE_INPUT_LINUX)
@@ -153,6 +164,12 @@ struct InputLinux {
int keycount;
int wheel;
bool initialized;
+
+ bool has_rel_x;
+ bool has_abs_x;
+ int num_keys;
+ int num_btns;
+
QTAILQ_ENTRY(InputLinux) next;
};
@@ -188,71 +205,55 @@ static void input_linux_toggle_grab(InputLinux *il)
}
}
-static void input_linux_event_keyboard(void *opaque)
+static void input_linux_handle_keyboard(InputLinux *il,
+ struct input_event *event)
{
- 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;
+ if (event->type == EV_KEY) {
+ if (event->value > 2 || (event->value > 1 && !il->repeat)) {
+ /*
+ * ignore autorepeat + unknown key events
+ * 0 == up, 1 == down, 2 == autorepeat, other == undefined
+ */
+ return;
+ }
+ if (event->code >= KEY_CNT) {
+ /*
+ * Should not happen. But better safe than sorry,
+ * and we make Coverity happy too.
+ */
+ return;
}
- switch (event.type) {
- case EV_KEY:
- if (event.value > 2 || (event.value > 1 && !il->repeat)) {
- /*
- * ignore autorepeat + unknown key events
- * 0 == up, 1 == down, 2 == autorepeat, other == undefined
- */
- continue;
- }
- if (event.code >= KEY_CNT) {
- /*
- * Should not happen. But better safe than sorry,
- * and we make Coverity happy too.
- */
- 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--;
- }
+ /* 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);
- }
+ /* 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;
- }
+ /* 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;
+ /*
+ * ... 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);
}
}
}
@@ -265,7 +266,59 @@ static void input_linux_event_mouse_button(int button)
qemu_input_event_sync();
}
-static void input_linux_event_mouse(void *opaque)
+static void input_linux_handle_mouse(InputLinux *il, struct input_event *event)
+{
+ if (!il->grab_active) {
+ return;
+ }
+
+ 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;
+ }
+}
+
+static void input_linux_event(void *opaque)
{
InputLinux *il = opaque;
struct input_event event;
@@ -282,54 +335,11 @@ static void input_linux_event_mouse(void *opaque)
break;
}
- /* only send event to guest when grab is active */
- if (!il->grab_active) {
- continue;
+ if (il->num_keys) {
+ input_linux_handle_keyboard(il, &event);
}
-
- 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;
+ if (il->has_rel_x && il->num_btns) {
+ input_linux_handle_mouse(il, &event);
}
}
}
@@ -337,7 +347,8 @@ static void input_linux_event_mouse(void *opaque)
static void input_linux_complete(UserCreatable *uc, Error **errp)
{
InputLinux *il = INPUT_LINUX(uc);
- uint32_t evtmap, relmap, absmap;
+ uint8_t evtmap, relmap, absmap, keymap[KEY_CNT / 8];
+ unsigned int i;
int rc, ver;
if (!il->evdev) {
@@ -365,36 +376,36 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
}
if (evtmap & (1 << EV_REL)) {
+ relmap = 0;
rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
- if (rc < 0) {
- relmap = 0;
+ if (relmap & (1 << REL_X)) {
+ il->has_rel_x = true;
}
}
if (evtmap & (1 << EV_ABS)) {
- ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
- if (rc < 0) {
- absmap = 0;
+ absmap = 0;
+ rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
+ if (absmap & (1 << ABS_X)) {
+ il->has_abs_x = true;
}
}
- if ((evtmap & (1 << EV_REL)) &&
- (relmap & (1 << REL_X))) {
- /* has relative x axis -> assume mouse */
- qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il);
- } else if ((evtmap & (1 << EV_ABS)) &&
- (absmap & (1 << ABS_X))) {
- /* has absolute x axis -> not supported */
- error_setg(errp, "tablet/touchscreen not supported");
- goto err_close;
- } else if (evtmap & (1 << EV_KEY)) {
- /* has keys/buttons (and no x 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;
+ if (evtmap & (1 << EV_KEY)) {
+ memset(keymap, 0, sizeof(keymap));
+ rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
+ for (i = 0; i < KEY_CNT; i++) {
+ if (keymap[i / 8] & (1 << (i % 8))) {
+ if (linux_is_button(i)) {
+ il->num_btns++;
+ } else {
+ il->num_keys++;
+ }
+ }
+ }
}
+
+ qemu_set_fd_handler(il->fd, input_linux_event, NULL, il);
input_linux_toggle_grab(il);
QTAILQ_INSERT_TAIL(&inputs, il, next);
il->initialized = true;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 10:56:31 +0000