initial commit

http/hw/hid/op.go

@@ -0,0 +1,73 @@
+package hid
+
+import (
+	"errors"
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func (h *Hid) OpenNoLock() {
+	var err error
+	h.CloseNoLock()
+
+	h.g0, err = os.OpenFile("/dev/hidg0", os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open /dev/hidg0 failed: %s", err)
+	}
+
+	h.g1, err = os.OpenFile("/dev/hidg1", os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open /dev/hidg1 failed: %s", err)
+	}
+
+	h.g2, err = os.OpenFile("/dev/hidg2", os.O_WRONLY, 0o666)
+	if err != nil {
+		log.Errorf("open /dev/hidg2 failed: %s", err)
+	}
+}
+
+func (h *Hid) Open() {
+	h.kbMutex.Lock()
+	defer h.kbMutex.Unlock()
+	h.mouseMutex.Lock()
+	defer h.mouseMutex.Unlock()
+
+	h.CloseNoLock()
+
+	h.OpenNoLock()
+}
+
+func (h *Hid) CloseNoLock() {
+	for _, file := range []*os.File{h.g0, h.g1, h.g2} {
+		if file != nil {
+			_ = file.Sync()
+			_ = file.Close()
+		}
+	}
+}
+
+func (h *Hid) Close() {
+	h.kbMutex.Lock()
+	defer h.kbMutex.Unlock()
+	h.mouseMutex.Lock()
+	defer h.mouseMutex.Unlock()
+
+	h.CloseNoLock()
+}
+
+func (h *Hid) Write(file *os.File, data []byte) {
+	_, err := file.Write(data)
+	if err != nil {
+		if errors.Is(err, os.ErrClosed) {
+			log.Debugf("hid already closed, reopen it...")
+			h.OpenNoLock()
+		} else {
+			log.Errorf("write to hid failed: %s", err)
+		}
+
+		return
+	}
+
+	log.Tracef("write to hid: %+v", data)
+}