stm32/eth: Permanently register netif with lwip during startup.

pi-anl · pi-anl · commit a5996edf2e39 · 2025-07-17T17:50:09.000+10:00
This restructures LWIP initialization and removes blocking PHY loops
to support static IP configuration before active(True) and eliminate
timeouts when starting without cable.

Changes:
- Split netif init into eth_netif_init_early() and eth_lwip_init()
- Initialize netif structure in eth_init() for early IP config
- Move netif stack registration to eth_start()
- Remove blocking PHY autonegotiation loop from eth_mac_init()
- Add eth_phy_configure_autoneg() for non-blocking setup
- Add eth_phy_link_status_poll() for link state management
- Only start DHCP if no static IP configured (0.0.0.0)
- Use default MAC speed/duplex config until autoneg completes

Benefits:
- Static IP can be configured before active(True)
- active(True) succeeds immediately without cable
- No more 10-second timeout on startup
- Link detection works properly when cable plugged later

Signed-off-by: Andrew Leech &lt;andrew.leech@planetinnovation.com.au&gt;
diff --git a/ports/stm32/eth.c b/ports/stm32/eth.c
@@ -273,22 +273,10 @@ static int eth_mac_init(eth_t *self) {
 
     #if defined(STM32H5)
     __HAL_RCC_ETH_RELEASE_RESET();
-
-    __HAL_RCC_ETH_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETHTX_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETHRX_CLK_SLEEP_DISABLE();
     #elif defined(STM32H7)
     __HAL_RCC_ETH1MAC_RELEASE_RESET();
-
-    __HAL_RCC_ETH1MAC_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETH1TX_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETH1RX_CLK_SLEEP_DISABLE();
     #else
     __HAL_RCC_ETHMAC_RELEASE_RESET();
-
-    __HAL_RCC_ETHMAC_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETHMACTX_CLK_SLEEP_DISABLE();
-    __HAL_RCC_ETHMACRX_CLK_SLEEP_DISABLE();
     #endif
 
     // Do a soft reset of the MAC core
