From: Dario Binacchi <dario.binac...@amarulasolutions.com> Linux need to fill up the HID descriptor in order to let the driver be emulated. The descriptor was downloaded from [1]. The patch was tested with evtest tool on top of qemu 5.2.0 with linux kernel 4.19.208.
[1] https://github.com/linuxwacom/wacom-hid-descriptors/tree/master/Wacom%20PenPartner Signed-off-by: Michael Trimarchi <mich...@amarulasolutions.com> Co-developed-by: Michael Trimarchi <mich...@amarulasolutions.com> Signed-off-by: Dario Binacchi <dario.binac...@amarulasolutions.com> Message-Id: <20220112090125.381364-1-dario.binac...@amarulasolutions.com> Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- hw/usb/dev-wacom.c | 72 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 71 insertions(+), 1 deletion(-) diff --git a/hw/usb/dev-wacom.c b/hw/usb/dev-wacom.c index ed687bc9f1eb..8323650c6a4d 100644 --- a/hw/usb/dev-wacom.c +++ b/hw/usb/dev-wacom.c @@ -69,6 +69,65 @@ static const USBDescStrings desc_strings = { [STR_SERIALNUMBER] = "1", }; +static const uint8_t qemu_wacom_hid_report_descriptor[] = { + 0x05, 0x01, /* Usage Page (Desktop) */ + 0x09, 0x02, /* Usage (Mouse) */ + 0xa1, 0x01, /* Collection (Application) */ + 0x85, 0x01, /* Report ID (1) */ + 0x09, 0x01, /* Usage (Pointer) */ + 0xa1, 0x00, /* Collection (Physical) */ + 0x05, 0x09, /* Usage Page (Button) */ + 0x19, 0x01, /* Usage Minimum (01h) */ + 0x29, 0x03, /* Usage Maximum (03h) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x25, 0x01, /* Logical Maximum (1) */ + 0x95, 0x03, /* Report Count (3) */ + 0x75, 0x01, /* Report Size (1) */ + 0x81, 0x02, /* Input (Data, Variable, Absolute) */ + 0x95, 0x01, /* Report Count (1) */ + 0x75, 0x05, /* Report Size (5) */ + 0x81, 0x01, /* Input (Constant) */ + 0x05, 0x01, /* Usage Page (Desktop) */ + 0x09, 0x30, /* Usage (X) */ + 0x09, 0x31, /* Usage (Y) */ + 0x09, 0x38, /* Usage (Wheel) */ + 0x15, 0x81, /* Logical Minimum (-127) */ + 0x25, 0x7f, /* Logical Maximum (127) */ + 0x75, 0x08, /* Report Size (8) */ + 0x95, 0x03, /* Report Count (3) */ + 0x81, 0x06, /* Input (Data, Variable, Relative) */ + 0x95, 0x03, /* Report Count (3) */ + 0x81, 0x01, /* Input (Constant) */ + 0xc0, /* End Collection */ + 0xc0, /* End Collection */ + 0x05, 0x0d, /* Usage Page (Digitizer) */ + 0x09, 0x01, /* Usage (Digitizer) */ + 0xa1, 0x01, /* Collection (Application) */ + 0x85, 0x02, /* Report ID (2) */ + 0xa1, 0x00, /* Collection (Physical) */ + 0x06, 0x00, 0xff,/* Usage Page (ff00h), vendor-defined */ + 0x09, 0x01, /* Usage (01h) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x26, 0xff, 0x00,/* Logical Maximum (255) */ + 0x75, 0x08, /* Report Size (8) */ + 0x95, 0x07, /* Report Count (7) */ + 0x81, 0x02, /* Input (Data, Variable, Absolute) */ + 0xc0, /* End Collection */ + 0x09, 0x01, /* Usage (01h) */ + 0x85, 0x63, /* Report ID (99) */ + 0x95, 0x07, /* Report Count (7) */ + 0x81, 0x02, /* Input (Data, Variable, Absolute) */ + 0x09, 0x01, /* Usage (01h) */ + 0x85, 0x02, /* Report ID (2) */ + 0x95, 0x01, /* Report Count (1) */ + 0xb1, 0x02, /* Feature (Variable) */ + 0x09, 0x01, /* Usage (01h) */ + 0x85, 0x03, /* Report ID (3) */ + 0x95, 0x01, /* Report Count (1) */ + 0xb1, 0x02, /* Feature (Variable) */ + 0xc0 /* End Collection */ +}; + static const USBDescIface desc_iface_wacom = { .bInterfaceNumber = 0, .bNumEndpoints = 1, @@ -86,7 +145,7 @@ static const USBDescIface desc_iface_wacom = { 0x00, /* u8 country_code */ 0x01, /* u8 num_descriptors */ USB_DT_REPORT, /* u8 type: Report */ - 0x6e, 0, /* u16 len */ + sizeof(qemu_wacom_hid_report_descriptor), 0, /* u16 len */ }, }, }, @@ -266,6 +325,17 @@ 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: + return; + } + break; case WACOM_SET_REPORT: if (s->mouse_grabbed) { qemu_remove_mouse_event_handler(s->eh_entry); -- 2.34.1
