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qemu/hw/input/virtio-input-hid.c
Gerd Hoffmann 55a1d80a41 virtio-input: emulated devices [device] 
This patch adds the virtio-input-hid base class and
virtio-{keyboard,mouse,tablet} subclasses building on the base class.
They are hooked up to the qemu input core and deliver input events
to the guest like all other hid devices (ps/2 kbd, usb tablet, ...).

Using them is as simple as adding "-device virtio-tablet-device" to
your command line, for use all transports except pci.  virtio-pci
support comes as separate patch, once virtio-pci got virtio 1.0
support.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2015-05-29 10:30:40 +02:00

503 lines
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/*
* 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/iov.h"
#include "hw/qdev.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-input.h"
#undef CONFIG_CURSES
#include "ui/console.h"
#include "standard-headers/linux/input.h"
#define VIRTIO_ID_NAME_KEYBOARD "QEMU Virtio Keyboard"
#define VIRTIO_ID_NAME_MOUSE "QEMU Virtio Mouse"
#define VIRTIO_ID_NAME_TABLET "QEMU Virtio Tablet"
/* ----------------------------------------------------------------- */
static const unsigned int keymap_qcode[Q_KEY_CODE_MAX] = {
[Q_KEY_CODE_ESC] = KEY_ESC,
[Q_KEY_CODE_1] = KEY_1,
[Q_KEY_CODE_2] = KEY_2,
[Q_KEY_CODE_3] = KEY_3,
[Q_KEY_CODE_4] = KEY_4,
[Q_KEY_CODE_5] = KEY_5,
[Q_KEY_CODE_6] = KEY_6,
[Q_KEY_CODE_7] = KEY_7,
[Q_KEY_CODE_8] = KEY_8,
[Q_KEY_CODE_9] = KEY_9,
[Q_KEY_CODE_0] = KEY_0,
[Q_KEY_CODE_MINUS] = KEY_MINUS,
[Q_KEY_CODE_EQUAL] = KEY_EQUAL,
[Q_KEY_CODE_BACKSPACE] = KEY_BACKSPACE,
[Q_KEY_CODE_TAB] = KEY_TAB,
[Q_KEY_CODE_Q] = KEY_Q,
[Q_KEY_CODE_W] = KEY_W,
[Q_KEY_CODE_E] = KEY_E,
[Q_KEY_CODE_R] = KEY_R,
[Q_KEY_CODE_T] = KEY_T,
[Q_KEY_CODE_Y] = KEY_Y,
[Q_KEY_CODE_U] = KEY_U,
[Q_KEY_CODE_I] = KEY_I,
[Q_KEY_CODE_O] = KEY_O,
[Q_KEY_CODE_P] = KEY_P,
[Q_KEY_CODE_BRACKET_LEFT] = KEY_LEFTBRACE,
[Q_KEY_CODE_BRACKET_RIGHT] = KEY_RIGHTBRACE,
[Q_KEY_CODE_RET] = KEY_ENTER,
[Q_KEY_CODE_CTRL] = KEY_LEFTCTRL,
[Q_KEY_CODE_A] = KEY_A,
[Q_KEY_CODE_S] = KEY_S,
[Q_KEY_CODE_D] = KEY_D,
[Q_KEY_CODE_F] = KEY_F,
[Q_KEY_CODE_G] = KEY_G,
[Q_KEY_CODE_H] = KEY_H,
[Q_KEY_CODE_J] = KEY_J,
[Q_KEY_CODE_K] = KEY_K,
[Q_KEY_CODE_L] = KEY_L,
[Q_KEY_CODE_SEMICOLON] = KEY_SEMICOLON,
[Q_KEY_CODE_APOSTROPHE] = KEY_APOSTROPHE,
[Q_KEY_CODE_GRAVE_ACCENT] = KEY_GRAVE,
[Q_KEY_CODE_SHIFT] = KEY_LEFTSHIFT,
[Q_KEY_CODE_BACKSLASH] = KEY_BACKSLASH,
[Q_KEY_CODE_LESS] = KEY_102ND,
[Q_KEY_CODE_Z] = KEY_Z,
[Q_KEY_CODE_X] = KEY_X,
[Q_KEY_CODE_C] = KEY_C,
[Q_KEY_CODE_V] = KEY_V,
[Q_KEY_CODE_B] = KEY_B,
[Q_KEY_CODE_N] = KEY_N,
[Q_KEY_CODE_M] = KEY_M,
[Q_KEY_CODE_COMMA] = KEY_COMMA,
[Q_KEY_CODE_DOT] = KEY_DOT,
[Q_KEY_CODE_SLASH] = KEY_SLASH,
[Q_KEY_CODE_SHIFT_R] = KEY_RIGHTSHIFT,
[Q_KEY_CODE_ALT] = KEY_LEFTALT,
[Q_KEY_CODE_SPC] = KEY_SPACE,
[Q_KEY_CODE_CAPS_LOCK] = KEY_CAPSLOCK,
[Q_KEY_CODE_F1] = KEY_F1,
[Q_KEY_CODE_F2] = KEY_F2,
[Q_KEY_CODE_F3] = KEY_F3,
[Q_KEY_CODE_F4] = KEY_F4,
[Q_KEY_CODE_F5] = KEY_F5,
[Q_KEY_CODE_F6] = KEY_F6,
[Q_KEY_CODE_F7] = KEY_F7,
[Q_KEY_CODE_F8] = KEY_F8,
[Q_KEY_CODE_F9] = KEY_F9,
[Q_KEY_CODE_F10] = KEY_F10,
[Q_KEY_CODE_NUM_LOCK] = KEY_NUMLOCK,
[Q_KEY_CODE_SCROLL_LOCK] = KEY_SCROLLLOCK,
[Q_KEY_CODE_KP_0] = KEY_KP0,
[Q_KEY_CODE_KP_1] = KEY_KP1,
[Q_KEY_CODE_KP_2] = KEY_KP2,
[Q_KEY_CODE_KP_3] = KEY_KP3,
[Q_KEY_CODE_KP_4] = KEY_KP4,
[Q_KEY_CODE_KP_5] = KEY_KP5,
[Q_KEY_CODE_KP_6] = KEY_KP6,
[Q_KEY_CODE_KP_7] = KEY_KP7,
[Q_KEY_CODE_KP_8] = KEY_KP8,
[Q_KEY_CODE_KP_9] = KEY_KP9,
[Q_KEY_CODE_KP_SUBTRACT] = KEY_KPMINUS,
[Q_KEY_CODE_KP_ADD] = KEY_KPPLUS,
[Q_KEY_CODE_KP_DECIMAL] = KEY_KPDOT,
[Q_KEY_CODE_KP_ENTER] = KEY_KPENTER,
[Q_KEY_CODE_KP_DIVIDE] = KEY_KPSLASH,
[Q_KEY_CODE_KP_MULTIPLY] = KEY_KPASTERISK,
[Q_KEY_CODE_F11] = KEY_F11,
[Q_KEY_CODE_F12] = KEY_F12,
[Q_KEY_CODE_CTRL_R] = KEY_RIGHTCTRL,
[Q_KEY_CODE_SYSRQ] = KEY_SYSRQ,
[Q_KEY_CODE_ALT_R] = KEY_RIGHTALT,
[Q_KEY_CODE_HOME] = KEY_HOME,
[Q_KEY_CODE_UP] = KEY_UP,
[Q_KEY_CODE_PGUP] = KEY_PAGEUP,
[Q_KEY_CODE_LEFT] = KEY_LEFT,
[Q_KEY_CODE_RIGHT] = KEY_RIGHT,
[Q_KEY_CODE_END] = KEY_END,
[Q_KEY_CODE_DOWN] = KEY_DOWN,
[Q_KEY_CODE_PGDN] = KEY_PAGEDOWN,
[Q_KEY_CODE_INSERT] = KEY_INSERT,
[Q_KEY_CODE_DELETE] = KEY_DELETE,
[Q_KEY_CODE_META_L] = KEY_LEFTMETA,
[Q_KEY_CODE_META_R] = KEY_RIGHTMETA,
[Q_KEY_CODE_MENU] = KEY_MENU,
};
static const unsigned int keymap_button[INPUT_BUTTON_MAX] = {
[INPUT_BUTTON_LEFT] = BTN_LEFT,
[INPUT_BUTTON_RIGHT] = BTN_RIGHT,
[INPUT_BUTTON_MIDDLE] = BTN_MIDDLE,
[INPUT_BUTTON_WHEEL_UP] = BTN_GEAR_UP,
[INPUT_BUTTON_WHEEL_DOWN] = BTN_GEAR_DOWN,
};
static const unsigned int axismap_rel[INPUT_AXIS_MAX] = {
[INPUT_AXIS_X] = REL_X,
[INPUT_AXIS_Y] = REL_Y,
};
static const unsigned int axismap_abs[INPUT_AXIS_MAX] = {
[INPUT_AXIS_X] = ABS_X,
[INPUT_AXIS_Y] = ABS_Y,
};
/* ----------------------------------------------------------------- */
static void virtio_input_key_config(VirtIOInput *vinput,
const unsigned int *keymap,
size_t mapsize)
{
virtio_input_config keys;
int i, bit, byte, bmax = 0;
memset(&keys, 0, sizeof(keys));
for (i = 0; i < mapsize; i++) {
bit = keymap[i];
if (!bit) {
continue;
}
byte = bit / 8;
bit = bit % 8;
keys.u.bitmap[byte] |= (1 << bit);
if (bmax < byte+1) {
bmax = byte+1;
}
}
keys.select = VIRTIO_INPUT_CFG_EV_BITS;
keys.subsel = EV_KEY;
keys.size = bmax;
virtio_input_add_config(vinput, &keys);
}
static void virtio_input_handle_event(DeviceState *dev, QemuConsole *src,
InputEvent *evt)
{
VirtIOInput *vinput = VIRTIO_INPUT(dev);
virtio_input_event event;
int qcode;
switch (evt->kind) {
case INPUT_EVENT_KIND_KEY:
qcode = qemu_input_key_value_to_qcode(evt->key->key);
if (qcode && keymap_qcode[qcode]) {
event.type = cpu_to_le16(EV_KEY);
event.code = cpu_to_le16(keymap_qcode[qcode]);
event.value = cpu_to_le32(evt->key->down ? 1 : 0);
virtio_input_send(vinput, &event);
} else {
if (evt->key->down) {
fprintf(stderr, "%s: unmapped key: %d [%s]\n", __func__,
qcode, QKeyCode_lookup[qcode]);
}
}
break;
case INPUT_EVENT_KIND_BTN:
if (keymap_button[evt->btn->button]) {
event.type = cpu_to_le16(EV_KEY);
event.code = cpu_to_le16(keymap_button[evt->btn->button]);
event.value = cpu_to_le32(evt->btn->down ? 1 : 0);
virtio_input_send(vinput, &event);
} else {
if (evt->btn->down) {
fprintf(stderr, "%s: unmapped button: %d [%s]\n", __func__,
evt->btn->button, InputButton_lookup[evt->btn->button]);
}
}
break;
case INPUT_EVENT_KIND_REL:
event.type = cpu_to_le16(EV_REL);
event.code = cpu_to_le16(axismap_rel[evt->rel->axis]);
event.value = cpu_to_le32(evt->rel->value);
virtio_input_send(vinput, &event);
break;
case INPUT_EVENT_KIND_ABS:
event.type = cpu_to_le16(EV_ABS);
event.code = cpu_to_le16(axismap_abs[evt->abs->axis]);
event.value = cpu_to_le32(evt->abs->value);
virtio_input_send(vinput, &event);
break;
default:
/* keep gcc happy */
break;
}
}
static void virtio_input_handle_sync(DeviceState *dev)
{
VirtIOInput *vinput = VIRTIO_INPUT(dev);
virtio_input_event event = {
.type = cpu_to_le16(EV_SYN),
.code = cpu_to_le16(SYN_REPORT),
.value = 0,
};
virtio_input_send(vinput, &event);
}
static void virtio_input_hid_realize(DeviceState *dev, Error **errp)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(dev);
vhid->hs = qemu_input_handler_register(dev, vhid->handler);
}
static void virtio_input_hid_unrealize(DeviceState *dev, Error **errp)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(dev);
qemu_input_handler_unregister(vhid->hs);
}
static void virtio_input_hid_change_active(VirtIOInput *vinput)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(vinput);
if (vinput->active) {
qemu_input_handler_activate(vhid->hs);
} else {
qemu_input_handler_deactivate(vhid->hs);
}
}
static void virtio_input_hid_handle_status(VirtIOInput *vinput,
virtio_input_event *event)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(vinput);
int ledbit = 0;
switch (le16_to_cpu(event->type)) {
case EV_LED:
if (event->code == LED_NUML) {
ledbit = QEMU_NUM_LOCK_LED;
} else if (event->code == LED_CAPSL) {
ledbit = QEMU_CAPS_LOCK_LED;
} else if (event->code == LED_SCROLLL) {
ledbit = QEMU_SCROLL_LOCK_LED;
}
if (event->value) {
vhid->ledstate |= ledbit;
} else {
vhid->ledstate &= ~ledbit;
}
kbd_put_ledstate(vhid->ledstate);
break;
default:
fprintf(stderr, "%s: unknown type %d\n", __func__,
le16_to_cpu(event->type));
break;
}
}
static void virtio_input_hid_class_init(ObjectClass *klass, void *data)
{
VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
vic->realize = virtio_input_hid_realize;
vic->unrealize = virtio_input_hid_unrealize;
vic->change_active = virtio_input_hid_change_active;
vic->handle_status = virtio_input_hid_handle_status;
}
static const TypeInfo virtio_input_hid_info = {
.name = TYPE_VIRTIO_INPUT_HID,
.parent = TYPE_VIRTIO_INPUT,
.instance_size = sizeof(VirtIOInputHID),
.class_init = virtio_input_hid_class_init,
.abstract = true,
};
/* ----------------------------------------------------------------- */
static QemuInputHandler virtio_keyboard_handler = {
.name = VIRTIO_ID_NAME_KEYBOARD,
.mask = INPUT_EVENT_MASK_KEY,
.event = virtio_input_handle_event,
.sync = virtio_input_handle_sync,
};
static struct virtio_input_config virtio_keyboard_config[] = {
{
.select = VIRTIO_INPUT_CFG_ID_NAME,
.size = sizeof(VIRTIO_ID_NAME_KEYBOARD),
.u.string = VIRTIO_ID_NAME_KEYBOARD,
},{
.select = VIRTIO_INPUT_CFG_ID_DEVIDS,
.size = sizeof(struct virtio_input_devids),
.u.ids = {
.bustype = const_le16(BUS_VIRTUAL),
.vendor = const_le16(0x0627), /* same we use for usb hid devices */
.product = const_le16(0x0001),
.version = const_le16(0x0001),
},
},{
.select = VIRTIO_INPUT_CFG_EV_BITS,
.subsel = EV_REP,
.size = 1,
},{
.select = VIRTIO_INPUT_CFG_EV_BITS,
.subsel = EV_LED,
.size = 1,
.u.bitmap = {
(1 << LED_NUML) | (1 << LED_CAPSL) | (1 << LED_SCROLLL),
},
},
{ /* end of list */ },
};
static void virtio_keyboard_init(Object *obj)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
VirtIOInput *vinput = VIRTIO_INPUT(obj);
vhid->handler = &virtio_keyboard_handler;
virtio_input_init_config(vinput, virtio_keyboard_config);
virtio_input_key_config(vinput, keymap_qcode,
ARRAY_SIZE(keymap_qcode));
}
static const TypeInfo virtio_keyboard_info = {
.name = TYPE_VIRTIO_KEYBOARD,
.parent = TYPE_VIRTIO_INPUT_HID,
.instance_size = sizeof(VirtIOInputHID),
.instance_init = virtio_keyboard_init,
};
/* ----------------------------------------------------------------- */
static QemuInputHandler virtio_mouse_handler = {
.name = VIRTIO_ID_NAME_MOUSE,
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
.event = virtio_input_handle_event,
.sync = virtio_input_handle_sync,
};
static struct virtio_input_config virtio_mouse_config[] = {
{
.select = VIRTIO_INPUT_CFG_ID_NAME,
.size = sizeof(VIRTIO_ID_NAME_MOUSE),
.u.string = VIRTIO_ID_NAME_MOUSE,
},{
.select = VIRTIO_INPUT_CFG_ID_DEVIDS,
.size = sizeof(struct virtio_input_devids),
.u.ids = {
.bustype = const_le16(BUS_VIRTUAL),
.vendor = const_le16(0x0627), /* same we use for usb hid devices */
.product = const_le16(0x0002),
.version = const_le16(0x0001),
},
},{
.select = VIRTIO_INPUT_CFG_EV_BITS,
.subsel = EV_REL,
.size = 1,
.u.bitmap = {
(1 << REL_X) | (1 << REL_Y),
},
},
{ /* end of list */ },
};
static void virtio_mouse_init(Object *obj)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
VirtIOInput *vinput = VIRTIO_INPUT(obj);
vhid->handler = &virtio_mouse_handler;
virtio_input_init_config(vinput, virtio_mouse_config);
virtio_input_key_config(vinput, keymap_button,
ARRAY_SIZE(keymap_button));
}
static const TypeInfo virtio_mouse_info = {
.name = TYPE_VIRTIO_MOUSE,
.parent = TYPE_VIRTIO_INPUT_HID,
.instance_size = sizeof(VirtIOInputHID),
.instance_init = virtio_mouse_init,
};
/* ----------------------------------------------------------------- */
static QemuInputHandler virtio_tablet_handler = {
.name = VIRTIO_ID_NAME_TABLET,
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
.event = virtio_input_handle_event,
.sync = virtio_input_handle_sync,
};
static struct virtio_input_config virtio_tablet_config[] = {
{
.select = VIRTIO_INPUT_CFG_ID_NAME,
.size = sizeof(VIRTIO_ID_NAME_TABLET),
.u.string = VIRTIO_ID_NAME_TABLET,
},{
.select = VIRTIO_INPUT_CFG_ID_DEVIDS,
.size = sizeof(struct virtio_input_devids),
.u.ids = {
.bustype = const_le16(BUS_VIRTUAL),
.vendor = const_le16(0x0627), /* same we use for usb hid devices */
.product = const_le16(0x0003),
.version = const_le16(0x0001),
},
},{
.select = VIRTIO_INPUT_CFG_EV_BITS,
.subsel = EV_ABS,
.size = 1,
.u.bitmap = {
(1 << ABS_X) | (1 << ABS_Y),
},
},{
.select = VIRTIO_INPUT_CFG_ABS_INFO,
.subsel = ABS_X,
.size = sizeof(virtio_input_absinfo),
.u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE),
},{
.select = VIRTIO_INPUT_CFG_ABS_INFO,
.subsel = ABS_Y,
.size = sizeof(virtio_input_absinfo),
.u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE),
},
{ /* end of list */ },
};
static void virtio_tablet_init(Object *obj)
{
VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
VirtIOInput *vinput = VIRTIO_INPUT(obj);
vhid->handler = &virtio_tablet_handler;
virtio_input_init_config(vinput, virtio_tablet_config);
virtio_input_key_config(vinput, keymap_button,
ARRAY_SIZE(keymap_button));
}
static const TypeInfo virtio_tablet_info = {
.name = TYPE_VIRTIO_TABLET,
.parent = TYPE_VIRTIO_INPUT_HID,
.instance_size = sizeof(VirtIOInputHID),
.instance_init = virtio_tablet_init,
};
/* ----------------------------------------------------------------- */
static void virtio_register_types(void)
{
type_register_static(&virtio_input_hid_info);
type_register_static(&virtio_keyboard_info);
type_register_static(&virtio_mouse_info);
type_register_static(&virtio_tablet_info);
}
type_init(virtio_register_types)
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