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[PATCH v2 3/6] virtio-input: add a virtio-mulitouch device
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From: |
Sergio Lopez |
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Subject: |
[PATCH v2 3/6] virtio-input: add a virtio-mulitouch device |
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Date: |
Thu, 16 Mar 2023 13:06:21 +0100 |
Add a virtio-multitouch device to the family of devices emulated by
virtio-input implementing the Multi-touch protocol as descripted here:
https://www.kernel.org/doc/html/latest/input/multi-touch-protocol.html?highlight=multi+touch
This patch just add the device itself, without connecting it to any
backends. The following patches will add a PCI-based multitouch device,
some helpers in "ui" and will enable the GTK3 backend to transpose
multi-touch events from the host to the guest.
Signed-off-by: Sergio Lopez <slp@redhat.com>
---
hw/input/virtio-input-hid.c | 118 ++++++++++++++++++++++++++++++-
include/hw/virtio/virtio-input.h | 9 +--
2 files changed, 120 insertions(+), 7 deletions(-)
diff --git a/hw/input/virtio-input-hid.c b/hw/input/virtio-input-hid.c
index d28dab69ba..742235d3fa 100644
--- a/hw/input/virtio-input-hid.c
+++ b/hw/input/virtio-input-hid.c
@@ -16,9 +16,10 @@
#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"
+#define VIRTIO_ID_NAME_KEYBOARD "QEMU Virtio Keyboard"
+#define VIRTIO_ID_NAME_MOUSE "QEMU Virtio Mouse"
+#define VIRTIO_ID_NAME_TABLET "QEMU Virtio Tablet"
+#define VIRTIO_ID_NAME_MULTITOUCH "QEMU Virtio Multitouch"
/* ----------------------------------------------------------------- */
@@ -30,6 +31,7 @@ static const unsigned short keymap_button[INPUT_BUTTON__MAX]
= {
[INPUT_BUTTON_WHEEL_DOWN] = BTN_GEAR_DOWN,
[INPUT_BUTTON_SIDE] = BTN_SIDE,
[INPUT_BUTTON_EXTRA] = BTN_EXTRA,
+ [INPUT_BUTTON_TOUCH] = BTN_TOUCH,
};
static const unsigned short axismap_rel[INPUT_AXIS__MAX] = {
@@ -42,6 +44,11 @@ static const unsigned short axismap_abs[INPUT_AXIS__MAX] = {
[INPUT_AXIS_Y] = ABS_Y,
};
+static const unsigned short axismap_tch[INPUT_AXIS__MAX] = {
+ [INPUT_AXIS_X] = ABS_MT_POSITION_X,
+ [INPUT_AXIS_Y] = ABS_MT_POSITION_Y,
+};
+
/* ----------------------------------------------------------------- */
static void virtio_input_extend_config(VirtIOInput *vinput,
@@ -81,6 +88,7 @@ static void virtio_input_handle_event(DeviceState *dev,
QemuConsole *src,
InputKeyEvent *key;
InputMoveEvent *move;
InputBtnEvent *btn;
+ InputMultitouchEvent *mtt;
switch (evt->type) {
case INPUT_EVENT_KIND_KEY:
@@ -137,6 +145,24 @@ static void virtio_input_handle_event(DeviceState *dev,
QemuConsole *src,
event.value = cpu_to_le32(move->value);
virtio_input_send(vinput, &event);
break;
+ case INPUT_EVENT_KIND_MTT:
+ mtt = evt->u.mtt.data;
+ if (mtt->type == INPUT_MULTITOUCH_TYPE_DATA) {
+ event.type = cpu_to_le16(EV_ABS);
+ event.code = cpu_to_le16(axismap_tch[mtt->axis]);
+ event.value = cpu_to_le32(mtt->value);
+ virtio_input_send(vinput, &event);
+ } else {
+ event.type = cpu_to_le16(EV_ABS);
+ event.code = cpu_to_le16(ABS_MT_SLOT);
+ event.value = cpu_to_le32(mtt->slot);
+ virtio_input_send(vinput, &event);
+ event.type = cpu_to_le16(EV_ABS);
+ event.code = cpu_to_le16(ABS_MT_TRACKING_ID);
+ event.value = cpu_to_le32(mtt->tracking_id);
+ virtio_input_send(vinput, &event);
+ }
+ break;
default:
/* keep gcc happy */
break;
@@ -515,12 +541,98 @@ static const TypeInfo virtio_tablet_info = {
/* ----------------------------------------------------------------- */
+static QemuInputHandler virtio_multitouch_handler = {
+ .name = VIRTIO_ID_NAME_MULTITOUCH,
+ .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_MTT,
+ .event = virtio_input_handle_event,
+ .sync = virtio_input_handle_sync,
+};
+
+static struct virtio_input_config virtio_multitouch_config[] = {
+ {
+ .select = VIRTIO_INPUT_CFG_ID_NAME,
+ .size = sizeof(VIRTIO_ID_NAME_MULTITOUCH),
+ .u.string = VIRTIO_ID_NAME_MULTITOUCH,
+ },{
+ .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_ABS_INFO,
+ .subsel = ABS_MT_SLOT,
+ .size = sizeof(virtio_input_absinfo),
+ .u.abs.min = const_le32(INPUT_EVENT_SLOTS_MIN),
+ .u.abs.max = const_le32(INPUT_EVENT_SLOTS_MAX),
+ },{
+ .select = VIRTIO_INPUT_CFG_ABS_INFO,
+ .subsel = ABS_MT_TRACKING_ID,
+ .size = sizeof(virtio_input_absinfo),
+ .u.abs.min = const_le32(INPUT_EVENT_SLOTS_MIN),
+ .u.abs.max = const_le32(INPUT_EVENT_SLOTS_MAX),
+ },{
+ .select = VIRTIO_INPUT_CFG_ABS_INFO,
+ .subsel = ABS_MT_POSITION_X,
+ .size = sizeof(virtio_input_absinfo),
+ .u.abs.min = const_le32(INPUT_EVENT_ABS_MIN),
+ .u.abs.max = const_le32(INPUT_EVENT_ABS_MAX),
+ },{
+ .select = VIRTIO_INPUT_CFG_ABS_INFO,
+ .subsel = ABS_MT_POSITION_Y,
+ .size = sizeof(virtio_input_absinfo),
+ .u.abs.min = const_le32(INPUT_EVENT_ABS_MIN),
+ .u.abs.max = const_le32(INPUT_EVENT_ABS_MAX),
+ },
+ { /* end of list */ },
+};
+
+static void virtio_multitouch_init(Object *obj)
+{
+ VirtIOInputHID *vhid = VIRTIO_INPUT_HID(obj);
+ VirtIOInput *vinput = VIRTIO_INPUT(obj);
+ unsigned short abs_props[] = {
+ INPUT_PROP_DIRECT,
+ };
+ unsigned short abs_bits[] = {
+ ABS_MT_SLOT,
+ ABS_MT_TRACKING_ID,
+ ABS_MT_POSITION_X,
+ ABS_MT_POSITION_Y,
+ };
+
+ vhid->handler = &virtio_multitouch_handler;
+ virtio_input_init_config(vinput, virtio_multitouch_config);
+ virtio_input_extend_config(vinput, keymap_button,
+ ARRAY_SIZE(keymap_button),
+ VIRTIO_INPUT_CFG_EV_BITS, EV_KEY);
+ virtio_input_extend_config(vinput, abs_props,
+ ARRAY_SIZE(abs_props),
+ VIRTIO_INPUT_CFG_PROP_BITS, 0);
+ virtio_input_extend_config(vinput, abs_bits,
+ ARRAY_SIZE(abs_bits),
+ VIRTIO_INPUT_CFG_EV_BITS, EV_ABS);
+}
+
+static const TypeInfo virtio_multitouch_info = {
+ .name = TYPE_VIRTIO_MULTITOUCH,
+ .parent = TYPE_VIRTIO_INPUT_HID,
+ .instance_size = sizeof(VirtIOInputHID),
+ .instance_init = virtio_multitouch_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_register_static(&virtio_multitouch_info);
}
type_init(virtio_register_types)
diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h
index f2da63d309..08f1591424 100644
--- a/include/hw/virtio/virtio-input.h
+++ b/include/hw/virtio/virtio-input.h
@@ -24,10 +24,11 @@ OBJECT_DECLARE_TYPE(VirtIOInput, VirtIOInputClass,
#define VIRTIO_INPUT_GET_PARENT_CLASS(obj) \
OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT)
-#define TYPE_VIRTIO_INPUT_HID "virtio-input-hid-device"
-#define TYPE_VIRTIO_KEYBOARD "virtio-keyboard-device"
-#define TYPE_VIRTIO_MOUSE "virtio-mouse-device"
-#define TYPE_VIRTIO_TABLET "virtio-tablet-device"
+#define TYPE_VIRTIO_INPUT_HID "virtio-input-hid-device"
+#define TYPE_VIRTIO_KEYBOARD "virtio-keyboard-device"
+#define TYPE_VIRTIO_MOUSE "virtio-mouse-device"
+#define TYPE_VIRTIO_TABLET "virtio-tablet-device"
+#define TYPE_VIRTIO_MULTITOUCH "virtio-multitouch-device"
OBJECT_DECLARE_SIMPLE_TYPE(VirtIOInputHID, VIRTIO_INPUT_HID)
#define VIRTIO_INPUT_HID_GET_PARENT_CLASS(obj) \
--
2.38.1
- [PATCH v2 0/6] Implement virtio-multitouch and enable GTK3 to use it, Sergio Lopez, 2023/03/16
- [PATCH v2 1/6] virtio-input: generalize virtio_input_key_config(), Sergio Lopez, 2023/03/16
- [PATCH v2 3/6] virtio-input: add a virtio-mulitouch device,
Sergio Lopez <=
- [PATCH v2 2/6] ui: add the infrastructure to support MT events, Sergio Lopez, 2023/03/16
- [PATCH v2 4/6] virtio-input-pci: add virtio-multitouch-pci, Sergio Lopez, 2023/03/16
- [PATCH v2 5/6] ui: add helpers for virtio-multitouch events, Sergio Lopez, 2023/03/16
- [PATCH v2 6/6] ui/gtk: enable backend to send multi-touch events, Sergio Lopez, 2023/03/16