init

src/otg/function.rs

@@ -0,0 +1,42 @@
+//! USB Gadget Function trait definition
+
+use std::path::Path;
+
+use crate::error::Result;
+
+/// Function metadata
+#[derive(Debug, Clone)]
+pub struct FunctionMeta {
+    /// Function name (e.g., "hid.usb0")
+    pub name: String,
+    /// Human-readable description
+    pub description: String,
+    /// Number of endpoints used
+    pub endpoints: u8,
+    /// Whether the function is enabled
+    pub enabled: bool,
+}
+
+/// USB Gadget Function trait
+pub trait GadgetFunction: Send + Sync {
+    /// Get function name (e.g., "hid.usb0", "mass_storage.usb0")
+    fn name(&self) -> &str;
+
+    /// Get number of endpoints required
+    fn endpoints_required(&self) -> u8;
+
+    /// Get function metadata
+    fn meta(&self) -> FunctionMeta;
+
+    /// Create function directory and configuration in ConfigFS
+    fn create(&self, gadget_path: &Path) -> Result<()>;
+
+    /// Link function to configuration
+    fn link(&self, config_path: &Path, gadget_path: &Path) -> Result<()>;
+
+    /// Unlink function from configuration
+    fn unlink(&self, config_path: &Path) -> Result<()>;
+
+    /// Cleanup function directory
+    fn cleanup(&self, gadget_path: &Path) -> Result<()>;
+}