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4b693b4279
Pre-open HID files during initialization to minimize I/O overhead during operation. Remove mouse event throttling mechanism to improve input responsiveness. Keep HID files open on write errors to avoid repeated file operations.
94 lines
2.3 KiB
Go
94 lines
2.3 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 relativeMouseConfig = gadgetConfigItem{
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order: 1002,
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device: "hid.usb2",
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path: []string{"functions", "hid.usb2"},
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configPath: []string{"hid.usb2"},
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attrs: gadgetAttributes{
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"protocol": "2",
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"subclass": "1",
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"report_length": "4",
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"no_out_endpoint": "1",
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},
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reportDesc: relativeMouseCombinedReportDesc,
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}
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// from: https://github.com/NicoHood/HID/blob/b16be57caef4295c6cd382a7e4c64db5073647f7/src/SingleReport/BootMouse.cpp#L26
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var relativeMouseCombinedReportDesc = []byte{
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0x05, 0x01, // USAGE_PAGE (Generic Desktop) 54
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0x09, 0x02, // USAGE (Mouse)
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0xa1, 0x01, // COLLECTION (Application)
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// Pointer and Physical are required by Apple Recovery
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0x09, 0x01, // USAGE (Pointer)
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0xa1, 0x00, // COLLECTION (Physical)
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// 8 Buttons
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0x05, 0x09, // USAGE_PAGE (Button)
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0x19, 0x01, // USAGE_MINIMUM (Button 1)
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0x29, 0x08, // USAGE_MAXIMUM (Button 8)
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0x15, 0x00, // LOGICAL_MINIMUM (0)
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0x25, 0x01, // LOGICAL_MAXIMUM (1)
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0x95, 0x08, // REPORT_COUNT (8)
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0x75, 0x01, // REPORT_SIZE (1)
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0x81, 0x02, // INPUT (Data,Var,Abs)
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// X, Y, Wheel
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0x05, 0x01, // USAGE_PAGE (Generic Desktop)
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0x09, 0x30, // USAGE (X)
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0x09, 0x31, // USAGE (Y)
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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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0x75, 0x08, // REPORT_SIZE (8)
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0x95, 0x03, // REPORT_COUNT (3)
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0x81, 0x06, // INPUT (Data,Var,Rel)
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// End
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0xc0, // End Collection (Physical)
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0xc0, // End Collection
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}
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func (u *UsbGadget) relMouseWriteHidFile(data []byte) error {
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if u.relMouseHidFile == nil {
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var err error
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u.relMouseHidFile, err = os.OpenFile("/dev/hidg2", os.O_RDWR, 0666)
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if err != nil {
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return fmt.Errorf("failed to open hidg2: %w", err)
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}
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}
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_, err := u.relMouseHidFile.Write(data)
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if err != nil {
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u.logWithSuppression("relMouseWriteHidFile", 100, u.log, err, "failed to write to hidg2")
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// Keep file open on write errors to reduce I/O overhead
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return err
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}
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u.resetLogSuppressionCounter("relMouseWriteHidFile")
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return nil
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}
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func (u *UsbGadget) RelMouseReport(mx, my int8, buttons uint8) error {
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u.relMouseLock.Lock()
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defer u.relMouseLock.Unlock()
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err := u.relMouseWriteHidFile([]byte{
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buttons, // Buttons
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uint8(mx), // X
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uint8(my), // Y
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0, // Wheel
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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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