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-rw-r--r--qemu/hw/input/virtio-input-host.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/qemu/hw/input/virtio-input-host.c b/qemu/hw/input/virtio-input-host.c
new file mode 100644
index 000000000..8978f16ba
--- /dev/null
+++ b/qemu/hw/input/virtio-input-host.c
@@ -0,0 +1,189 @@
+/*
+ * 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-common.h"
+#include "qemu/sockets.h"
+
+#include "hw/qdev.h"
+#include "hw/virtio/virtio.h"
+#include "hw/virtio/virtio-input.h"
+
+#include <sys/ioctl.h>
+#include "standard-headers/linux/input.h"
+
+/* ----------------------------------------------------------------- */
+
+static struct virtio_input_config virtio_input_host_config[] = {
+ { /* empty list */ },
+};
+
+static void virtio_input_host_event(void *opaque)
+{
+ VirtIOInputHost *vih = opaque;
+ VirtIOInput *vinput = VIRTIO_INPUT(vih);
+ struct virtio_input_event virtio;
+ struct input_event evdev;
+ int rc;
+
+ for (;;) {
+ rc = read(vih->fd, &evdev, sizeof(evdev));
+ if (rc != sizeof(evdev)) {
+ break;
+ }
+
+ virtio.type = cpu_to_le16(evdev.type);
+ virtio.code = cpu_to_le16(evdev.code);
+ virtio.value = cpu_to_le32(evdev.value);
+ virtio_input_send(vinput, &virtio);
+ }
+}
+
+static void virtio_input_bits_config(VirtIOInputHost *vih,
+ int type, int count)
+{
+ virtio_input_config bits;
+ int rc, i, size = 0;
+
+ memset(&bits, 0, sizeof(bits));
+ rc = ioctl(vih->fd, EVIOCGBIT(type, count/8), bits.u.bitmap);
+ if (rc < 0) {
+ return;
+ }
+
+ for (i = 0; i < count/8; i++) {
+ if (bits.u.bitmap[i]) {
+ size = i+1;
+ }
+ }
+ if (size == 0) {
+ return;
+ }
+
+ bits.select = VIRTIO_INPUT_CFG_EV_BITS;
+ bits.subsel = type;
+ bits.size = size;
+ virtio_input_add_config(VIRTIO_INPUT(vih), &bits);
+}
+
+static void virtio_input_host_realize(DeviceState *dev, Error **errp)
+{
+ VirtIOInputHost *vih = VIRTIO_INPUT_HOST(dev);
+ VirtIOInput *vinput = VIRTIO_INPUT(dev);
+ virtio_input_config id;
+ struct input_id ids;
+ int rc, ver;
+
+ if (!vih->evdev) {
+ error_setg(errp, "evdev property is required");
+ return;
+ }
+
+ vih->fd = open(vih->evdev, O_RDWR);
+ if (vih->fd < 0) {
+ error_setg_file_open(errp, errno, vih->evdev);
+ return;
+ }
+ qemu_set_nonblock(vih->fd);
+
+ rc = ioctl(vih->fd, EVIOCGVERSION, &ver);
+ if (rc < 0) {
+ error_setg(errp, "%s: is not an evdev device", vih->evdev);
+ goto err_close;
+ }
+
+ rc = ioctl(vih->fd, EVIOCGRAB, 1);
+ if (rc < 0) {
+ error_setg_errno(errp, errno, "%s: failed to get exclusive access",
+ vih->evdev);
+ goto err_close;
+ }
+
+ memset(&id, 0, sizeof(id));
+ ioctl(vih->fd, EVIOCGNAME(sizeof(id.u.string)-1), id.u.string);
+ id.select = VIRTIO_INPUT_CFG_ID_NAME;
+ id.size = strlen(id.u.string);
+ virtio_input_add_config(vinput, &id);
+
+ if (ioctl(vih->fd, EVIOCGID, &ids) == 0) {
+ memset(&id, 0, sizeof(id));
+ id.select = VIRTIO_INPUT_CFG_ID_DEVIDS;
+ id.size = sizeof(struct virtio_input_devids);
+ id.u.ids.bustype = cpu_to_le16(ids.bustype);
+ id.u.ids.vendor = cpu_to_le16(ids.vendor);
+ id.u.ids.product = cpu_to_le16(ids.product);
+ id.u.ids.version = cpu_to_le16(ids.version);
+ virtio_input_add_config(vinput, &id);
+ }
+
+ virtio_input_bits_config(vih, EV_KEY, KEY_CNT);
+ virtio_input_bits_config(vih, EV_REL, REL_CNT);
+ virtio_input_bits_config(vih, EV_ABS, ABS_CNT);
+ virtio_input_bits_config(vih, EV_MSC, MSC_CNT);
+ virtio_input_bits_config(vih, EV_SW, SW_CNT);
+
+ qemu_set_fd_handler(vih->fd, virtio_input_host_event, NULL, vih);
+ return;
+
+err_close:
+ close(vih->fd);
+ vih->fd = -1;
+ return;
+}
+
+static void virtio_input_host_unrealize(DeviceState *dev, Error **errp)
+{
+ VirtIOInputHost *vih = VIRTIO_INPUT_HOST(dev);
+
+ if (vih->fd > 0) {
+ qemu_set_fd_handler(vih->fd, NULL, NULL, NULL);
+ close(vih->fd);
+ }
+}
+
+static const VMStateDescription vmstate_virtio_input_host = {
+ .name = "virtio-input-host",
+ .unmigratable = 1,
+};
+
+static Property virtio_input_host_properties[] = {
+ DEFINE_PROP_STRING("evdev", VirtIOInputHost, evdev),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_input_host_class_init(ObjectClass *klass, void *data)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->vmsd = &vmstate_virtio_input_host;
+ dc->props = virtio_input_host_properties;
+ vic->realize = virtio_input_host_realize;
+ vic->unrealize = virtio_input_host_unrealize;
+}
+
+static void virtio_input_host_init(Object *obj)
+{
+ VirtIOInput *vinput = VIRTIO_INPUT(obj);
+
+ virtio_input_init_config(vinput, virtio_input_host_config);
+}
+
+static const TypeInfo virtio_input_host_info = {
+ .name = TYPE_VIRTIO_INPUT_HOST,
+ .parent = TYPE_VIRTIO_INPUT,
+ .instance_size = sizeof(VirtIOInputHost),
+ .instance_init = virtio_input_host_init,
+ .class_init = virtio_input_host_class_init,
+};
+
+/* ----------------------------------------------------------------- */
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_input_host_info);
+}
+
+type_init(virtio_register_types)