eth: Add lan8742a PHY

embassy-stm32/src/eth/mod.rs

@@ -3,5 +3,32 @@
 #[cfg_attr(eth_v1, path = "v1.rs")]
 #[cfg_attr(eth_v2, path = "v2/mod.rs")]
 mod _version;
+pub mod lan8742a;
 
 pub use _version::*;
+
+/// Station Management Interface (SMI) on an ethernet PHY
+///
+/// # Safety
+///
+/// The methods cannot move out of self
+pub unsafe trait StationManagement {
+    /// Read a register over SMI.
+    fn smi_read(&mut self, reg: u8) -> u16;
+    /// Write a register over SMI.
+    fn smi_write(&mut self, reg: u8, val: u16);
+}
+
+/// Traits for an Ethernet PHY
+///
+/// # Safety
+///
+/// The methods cannot move S
+pub unsafe trait PHY {
+    /// Reset PHY and wait for it to come out of reset.
+    fn phy_reset<S: StationManagement>(sm: &mut S);
+    /// PHY initialisation.
+    fn phy_init<S: StationManagement>(sm: &mut S);
+    /// Poll link to see if it is up and FD with 100Mbps
+    fn poll_link<S: StationManagement>(sm: &mut S) -> bool;
+}