mirror of https://github.com/jetkvm/kvm.git
125 lines
3.4 KiB
Go
125 lines
3.4 KiB
Go
package usbgadget
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import (
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"fmt"
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"os"
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)
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var absoluteMouseConfig = gadgetConfigItem{
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order: 1001,
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device: "hid.usb1",
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path: []string{"functions", "hid.usb1"},
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configPath: []string{"hid.usb1"},
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attrs: gadgetAttributes{
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"protocol": "2",
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"subclass": "0",
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"report_length": "6",
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"no_out_endpoint": "1",
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},
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reportDesc: absoluteMouseCombinedReportDesc,
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}
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var absoluteMouseCombinedReportDesc = []byte{
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0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
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0x09, 0x02, // Usage (Mouse)
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0xA1, 0x01, // Collection (Application)
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// Report ID 1: Absolute Mouse Movement
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0x85, 0x01, // Report ID (1)
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0x09, 0x01, // Usage (Pointer)
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0xA1, 0x00, // Collection (Physical)
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0x05, 0x09, // Usage Page (Button)
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0x19, 0x01, // Usage Minimum (0x01)
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0x29, 0x03, // Usage Maximum (0x03)
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0x15, 0x00, // Logical Minimum (0)
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0x25, 0x01, // Logical Maximum (1)
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0x75, 0x01, // Report Size (1)
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0x95, 0x03, // Report Count (3)
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0x81, 0x02, // Input (Data, Var, Abs)
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0x95, 0x01, // Report Count (1)
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0x75, 0x05, // Report Size (5)
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0x81, 0x03, // Input (Cnst, Var, Abs)
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0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
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0x09, 0x30, // Usage (X)
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0x09, 0x31, // Usage (Y)
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0x16, 0x00, 0x00, // Logical Minimum (0)
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0x26, 0xFF, 0x7F, // Logical Maximum (32767)
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0x36, 0x00, 0x00, // Physical Minimum (0)
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0x46, 0xFF, 0x7F, // Physical Maximum (32767)
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0x75, 0x10, // Report Size (16)
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0x95, 0x02, // Report Count (2)
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0x81, 0x02, // Input (Data, Var, Abs)
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0xC0, // End Collection
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// Report ID 2: Relative Wheel Movement
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0x85, 0x02, // Report ID (2)
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0x09, 0x38, // Usage (Wheel)
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0x15, 0x81, // Logical Minimum (-127)
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0x25, 0x7F, // Logical Maximum (127)
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0x35, 0x00, // Physical Minimum (0) = Reset Physical Minimum
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0x45, 0x00, // Physical Maximum (0) = Reset Physical Maximum
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0x75, 0x08, // Report Size (8)
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0x95, 0x01, // Report Count (1)
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0x81, 0x06, // Input (Data, Var, Rel)
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0xC0, // End Collection
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}
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func (u *UsbGadget) absMouseWriteHidFile(data []byte) error {
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if u.absMouseHidFile == nil {
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var err error
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u.absMouseHidFile, err = os.OpenFile("/dev/hidg1", os.O_RDWR, 0666)
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if err != nil {
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return fmt.Errorf("failed to open hidg1: %w", err)
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}
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}
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_, err := u.writeWithTimeout(u.absMouseHidFile, data)
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if err != nil {
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u.logWithSuppression("absMouseWriteHidFile", 100, u.log, err, "failed to write to hidg1")
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u.absMouseHidFile.Close()
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u.absMouseHidFile = nil
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return err
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}
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u.resetLogSuppressionCounter("absMouseWriteHidFile")
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return nil
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}
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func (u *UsbGadget) AbsMouseReport(x int, y int, buttons uint8) error {
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u.absMouseLock.Lock()
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defer u.absMouseLock.Unlock()
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err := u.absMouseWriteHidFile([]byte{
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1, // Report ID 1
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buttons, // Buttons
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byte(x), // X Low Byte
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byte(x >> 8), // X High Byte
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byte(y), // Y Low Byte
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byte(y >> 8), // Y High Byte
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})
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if err != nil {
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return err
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}
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u.resetUserInputTime()
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return nil
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}
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func (u *UsbGadget) AbsMouseWheelReport(wheelY int8) error {
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u.absMouseLock.Lock()
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defer u.absMouseLock.Unlock()
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// Only send a report if the value is non-zero
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if wheelY == 0 {
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return nil
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}
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err := u.absMouseWriteHidFile([]byte{
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2, // Report ID 2
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byte(wheelY), // Wheel Y (signed)
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})
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u.resetUserInputTime()
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return err
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}
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