Kasli-SoC: Get MAC address from EEPROM (#90)

Co-authored-by: mwojcik <mw@m-labs.hk>
Co-committed-by: mwojcik <mw@m-labs.hk>

Cargo.toml

@@ -14,7 +14,7 @@ members = [
 panic = "abort"
 debug = true
 codegen-units = 1
-opt-level = 'z'
+opt-level = 's'
 lto = true
 debug-assertions = false
 overflow-checks = false

libconfig/src/net_settings.rs

@@ -30,7 +30,19 @@ impl fmt::Display for NetAddresses {
     }
 }
 
-pub fn get_adresses(cfg: &Config) -> NetAddresses {
+#[cfg(feature = "target_kasli_soc")]
+fn get_address_from_eeprom() -> EthernetAddress {
+    use libboard_zynq::i2c::{I2c, eeprom};
+
+    let mut i2c = I2c::i2c0();
+    i2c.init().unwrap();
+    let mut eeprom = eeprom::EEPROM::new(&mut i2c, 16);
+    let address = eeprom.read_eui48().unwrap_or([0x02, 0x00, 0x00, 0x00, 0x00, 0x56]);
+
+    EthernetAddress(address)
+}
+
+pub fn get_addresses(cfg: &Config) -> NetAddresses {
     #[cfg(feature = "target_zc706")]
     let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x52]);
     #[cfg(feature = "target_zc706")]
@@ -44,7 +56,7 @@ pub fn get_adresses(cfg: &Config) -> NetAddresses {
     #[cfg(feature = "target_redpitaya")]
     let mut ipv4_addr = IpAddress::v4(192, 168, 1, 55);
     #[cfg(feature = "target_kasli_soc")]
-    let mut hardware_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x56]);
+    let mut hardware_addr = get_address_from_eeprom();
     #[cfg(feature = "target_kasli_soc")]
     let mut ipv4_addr = IpAddress::v4(192, 168, 1, 56);
 

szl/src/netboot.rs

@@ -316,7 +316,7 @@ pub fn netboot<File: Read + Seek>(
     runtime_max_len: usize,
 ) {
     log::info!("Preparing network for netboot");
-    let net_addresses = net_settings::get_adresses(&cfg);
+    let net_addresses = net_settings::get_addresses(&cfg);
     log::info!("Network addresses: {}", net_addresses);
     let eth = Eth::eth0(net_addresses.hardware_addr.0.clone());
     let eth = eth.start_rx(8);