refactor(usb): move usbconfig to a seperated package

2026-01-18 03:28:19 +01:00 · 2025-03-10 02:08:47 +01:00
parent c088534d34
commit d1948adca8
16 changed files with 1045 additions and 604 deletions
--- a/internal/usbgadget/hid_mouse_absolute.go
+++ b/internal/usbgadget/hid_mouse_absolute.go
@@ -0,0 +1,128 @@
+package usbgadget
+
+import (
+	"fmt"
+	"os"
+)
+
+var absoluteMouseConfig = gadgetConfigItem{
+	order:      1001,
+	device:     "hid.usb1",
+	path:       []string{"functions", "hid.usb1"},
+	configPath: []string{"hid.usb1"},
+	attrs: gadgetAttributes{
+		"protocol":      "2",
+		"subclass":      "1",
+		"report_length": "6",
+	},
+	reportDesc: absoluteMouseCombinedReportDesc,
+}
+
+var absoluteMouseCombinedReportDesc = []byte{
+	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
+	0x09, 0x02, // Usage (Mouse)
+	0xA1, 0x01, // Collection (Application)
+
+	// Report ID 1: Absolute Mouse Movement
+	0x85, 0x01, //     Report ID (1)
+	0x09, 0x01, //     Usage (Pointer)
+	0xA1, 0x00, //     Collection (Physical)
+	0x05, 0x09, //         Usage Page (Button)
+	0x19, 0x01, //         Usage Minimum (0x01)
+	0x29, 0x03, //         Usage Maximum (0x03)
+	0x15, 0x00, //         Logical Minimum (0)
+	0x25, 0x01, //         Logical Maximum (1)
+	0x75, 0x01, //         Report Size (1)
+	0x95, 0x03, //         Report Count (3)
+	0x81, 0x02, //         Input (Data, Var, Abs)
+	0x95, 0x01, //         Report Count (1)
+	0x75, 0x05, //         Report Size (5)
+	0x81, 0x03, //         Input (Cnst, Var, Abs)
+	0x05, 0x01, //         Usage Page (Generic Desktop Ctrls)
+	0x09, 0x30, //         Usage (X)
+	0x09, 0x31, //         Usage (Y)
+	0x16, 0x00, 0x00, //         Logical Minimum (0)
+	0x26, 0xFF, 0x7F, //         Logical Maximum (32767)
+	0x36, 0x00, 0x00, //         Physical Minimum (0)
+	0x46, 0xFF, 0x7F, //         Physical Maximum (32767)
+	0x75, 0x10, //         Report Size (16)
+	0x95, 0x02, //         Report Count (2)
+	0x81, 0x02, //         Input (Data, Var, Abs)
+	0xC0, //     End Collection
+
+	// Report ID 2: Relative Wheel Movement
+	0x85, 0x02, //     Report ID (2)
+	0x09, 0x38, //     Usage (Wheel)
+	0x15, 0x81, //     Logical Minimum (-127)
+	0x25, 0x7F, //     Logical Maximum (127)
+	0x75, 0x08, //     Report Size (8)
+	0x95, 0x01, //     Report Count (1)
+	0x81, 0x06, //     Input (Data, Var, Rel)
+
+	0xC0, // End Collection
+}
+
+func (u *UsbGadget) absMouseWriteHidFile(data []byte) error {
+	if u.absMouseHidFile == nil {
+		var err error
+		u.absMouseHidFile, err = os.OpenFile("/dev/hidg1", os.O_RDWR, 0666)
+		if err != nil {
+			return fmt.Errorf("failed to open hidg1: %w", err)
+		}
+	}
+
+	_, err := u.absMouseHidFile.Write(data)
+	if err != nil {
+		u.log.Errorf("failed to write to hidg1: %w", err)
+		u.absMouseHidFile.Close()
+		u.absMouseHidFile = nil
+		return err
+	}
+	return nil
+}
+
+func (u *UsbGadget) AbsMouseReport(x, y int, buttons uint8) error {
+	u.absMouseLock.Lock()
+	defer u.absMouseLock.Unlock()
+
+	err := u.absMouseWriteHidFile([]byte{
+		1,             // Report ID 1
+		buttons,       // Buttons
+		uint8(x),      // X Low Byte
+		uint8(x >> 8), // X High Byte
+		uint8(y),      // Y Low Byte
+		uint8(y >> 8), // Y High Byte
+	})
+	if err != nil {
+		return err
+	}
+
+	u.resetUserInputTime()
+	return nil
+}
+
+func (u *UsbGadget) AbsMouseWheelReport(wheelY int8) error {
+	u.absMouseLock.Lock()
+	defer u.absMouseLock.Unlock()
+
+	// Accumulate the wheelY value
+	u.absMouseAccumulatedWheelY += float64(wheelY) / 8.0
+
+	// Only send a report if the accumulated value is significant
+	if abs(u.absMouseAccumulatedWheelY) < 1.0 {
+		return nil
+	}
+
+	scaledWheelY := int8(u.absMouseAccumulatedWheelY)
+
+	err := u.absMouseWriteHidFile([]byte{
+		2,                  // Report ID 2
+		byte(scaledWheelY), // Scaled Wheel Y (signed)
+	})
+
+	// Reset the accumulator, keeping any remainder
+	u.absMouseAccumulatedWheelY -= float64(scaledWheelY)
+
+	u.resetUserInputTime()
+	return err
+}