From: Michael Trimarchi <michael@amarulasolutions.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: [PATCH] hw: dev-wacom: Support wacom tablet emulation in linux qemu
Date: Wed, 12 Aug 2020 17:21:49 +0200 [thread overview]
Message-ID: <20200812152149.260163-1-michael@amarulasolutions.com> (raw)
Linux need to fill up the hid descriptor in order to let
the driver be emulated. This patch was tested on top of
qemu 4.2.0 and recent linux kernel.
modprobe wacom.ko
evtest tool
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
---
hw/usb/dev-wacom.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/hw/usb/dev-wacom.c b/hw/usb/dev-wacom.c
index 8aba44b8bc..fe95699672 100644
--- a/hw/usb/dev-wacom.c
+++ b/hw/usb/dev-wacom.c
@@ -259,6 +259,64 @@ static void usb_wacom_handle_reset(USBDevice *dev)
s->mode = WACOM_MODE_HID;
}
+static const uint8_t qemu_wacom_hid_report_descriptor[] = {
+ 0x05, 0x01,
+ 0x09, 0x02,
+ 0xa1, 0x01,
+ 0x85, 0x01,
+ 0x09, 0x01,
+ 0xa1, 0x00,
+ 0x05, 0x09,
+ 0x19, 0x01,
+ 0x29, 0x03,
+ 0x15, 0x00,
+ 0x25, 0x01,
+ 0x95, 0x03,
+ 0x75, 0x01,
+ 0x81, 0x02,
+ 0x95, 0x01,
+ 0x75, 0x05,
+ 0x81, 0x01,
+ 0x05, 0x01,
+ 0x09, 0x30,
+ 0x09, 0x31,
+ 0x09, 0x38,
+ 0x15, 0x81,
+ 0x25, 0x7f,
+ 0x75, 0x08,
+ 0x95, 0x03,
+ 0x81, 0x06,
+ 0x95, 0x03,
+ 0x81, 0x01,
+ 0xc0, 0xc0,
+ 0x05, 0x0d,
+ 0x09, 0x01,
+ 0xa1, 0x01,
+ 0x85, 0x02,
+ 0xa1, 0x00,
+ 0x06, 0x00,
+ 0xff, 0x09,
+ 0x01, 0x15,
+ 0x00, 0x26,
+ 0xff, 0x00,
+ 0x75, 0x08,
+ 0x95, 0x07,
+ 0x81, 0x02,
+ 0xc0, 0x09,
+ 0x01, 0x85,
+ 0x63, 0x95,
+ 0x07, 0x81,
+ 0x02, 0x09,
+ 0x01, 0x85,
+ 0x02, 0x95,
+ 0x01, 0xb1,
+ 0x02, 0x09,
+ 0x01, 0x85,
+ 0x03, 0x95,
+ 0x01, 0xb1,
+ 0x02, 0xc0,
+};
+
static void usb_wacom_handle_control(USBDevice *dev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
@@ -271,6 +329,18 @@ static void usb_wacom_handle_control(USBDevice *dev, USBPacket *p,
}
switch (request) {
+ case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
+ switch (value >> 8) {
+ case 0x22:
+ memcpy(data, qemu_wacom_hid_report_descriptor,
+ sizeof(qemu_wacom_hid_report_descriptor));
+ p->actual_length = sizeof(qemu_wacom_hid_report_descriptor);
+ break;
+ default:
+ goto fail;
+ }
+ break;
+
case WACOM_SET_REPORT:
if (s->mouse_grabbed) {
qemu_remove_mouse_event_handler(s->eh_entry);
--
2.25.1
next reply other threads:[~2020-08-12 15:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 15:21 Michael Trimarchi [this message]
2020-08-17 6:47 ` [PATCH] hw: dev-wacom: Support wacom tablet emulation in linux qemu Gerd Hoffmann
2020-08-17 6:48 ` Michael Nazzareno Trimarchi
2020-08-17 7:28 ` Gerd Hoffmann
2020-08-17 16:42 ` Michael Nazzareno Trimarchi
2020-08-18 6:02 ` Gerd Hoffmann
2020-08-18 8:23 ` Michael Nazzareno Trimarchi
2020-08-19 5:52 ` Gerd Hoffmann
2020-08-21 16:24 ` Michael Nazzareno Trimarchi
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