diff options
Diffstat (limited to 'qemu/hw/input/virtio-input-host.c')
| -rw-r--r-- | qemu/hw/input/virtio-input-host.c | 189 |
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) |