drivers: ethernet: support for numaker m55m1x series

Add support for Nuvoton numaker m55m1x series EMAC controller.
Also include NOCACHE_MEMORY allocation.
Support to generate random mac address and remove emac data flash.

Signed-off-by: cyliang tw <cyliang@nuvoton.com>

boards/nuvoton/numaker_m55m1/Kconfig.defconfig

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Nuvoton NuMaker M55M1 board configuration
+#
+# Copyright (c) 2025 Nuvoton Technology Corporation.
+
+if BOARD_NUMAKER_M55M1
+
+if NETWORKING
+
+config NET_L2_ETHERNET
+	default y if !MODEM
+
+endif # NETWORKING
+
+endif # BOARD_NUMAKER_M55M1

boards/nuvoton/numaker_m55m1/numaker_m55m1-pinctrl.dtsi

@@ -24,4 +24,23 @@
 				 <PC9MFP_GPIO>;
 		};
 	};
+
+	/* EMAC multi-function pins for MDIO, TX, REFCLK, RX pins */
+	emac_default: emac_default {
+		group0 {
+			pinmux = <PE8MFP_EMAC0_RMII_MDC>,
+				 <PE9MFP_EMAC0_RMII_MDIO>,
+				 <PC8MFP_EMAC0_RMII_REFCLK>,
+				 <PC7MFP_EMAC0_RMII_RXD0>,
+				 <PC6MFP_EMAC0_RMII_RXD1>,
+				 <PA7MFP_EMAC0_RMII_CRSDV>,
+				 <PA6MFP_EMAC0_RMII_RXERR>;
+		};
+		group1 {
+			pinmux = <PE10MFP_EMAC0_RMII_TXD0>,
+				 <PE11MFP_EMAC0_RMII_TXD1>,
+				 <PE12MFP_EMAC0_RMII_TXEN>;
+				 slew-rate = "fast";
+		};
+	};
 };

boards/nuvoton/numaker_m55m1/numaker_m55m1.dts

@@ -86,3 +86,9 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&emac {
+	pinctrl-0 = <&emac_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};

doc/releases/migration-guide-4.2.rst

@@ -133,6 +133,9 @@ Ethernet
   kconfig options: :kconfig:option:`CONFIG_ETH_NATIVE_POSIX` and its related options have been
   deprecated in favor of :kconfig:option:`CONFIG_ETH_NATIVE_TAP` (:github:`86578`).
 
+* NuMaker Ethernet driver ``eth_numaker.c`` now supports ``gen_random_mac``,
+  and the EMAC data flash feature has been removed (:github:`87953`).
+
 Enhanced Serial Peripheral Interface (eSPI)
 ===========================================
 

drivers/ethernet/Kconfig.numaker

@@ -9,6 +9,7 @@ config ETH_NUMAKER
 	select HAS_NUMAKER_ETH
 	select PINCTRL
 	depends on DT_HAS_NUVOTON_NUMAKER_ETHERNET_ENABLED
+	select NOCACHE_MEMORY if ARCH_HAS_NOCACHE_MEMORY_SUPPORT
 	help
 	  This option enables the Ethernet driver for Nuvoton NuMaker family of
 	  processors.

drivers/ethernet/eth_numaker.c

@@ -21,22 +21,31 @@
 
 #ifdef CONFIG_SOC_M467
 #include <m460_eth.h>
+#else
+#include <numaker_eth.h>
 #endif
 
 LOG_MODULE_REGISTER(eth_numaker, CONFIG_ETHERNET_LOG_LEVEL);
 
 /* Device EMAC Interface port */
 #define NUMAKER_GMAC_INTF  0
-/* 2KB Data Flash at 0xFF800 */
-#define NUMAKER_DATA_FLASH (0xFF800U)
+
 #define NUMAKER_MASK_32    (0xFFFFFFFFU)
 #define NUMAKER_MII_CONFIG (ADVERTISE_CSMA | ADVERTISE_10HALF | ADVERTISE_10FULL | \
 							ADVERTISE_100HALF | ADVERTISE_100FULL)
 #define NUMAKER_MII_LINKED (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)
 
 extern synopGMACdevice GMACdev[GMAC_CNT];
+
+#ifdef CONFIG_NOCACHE_MEMORY
+DmaDesc tx_desc[GMAC_CNT][TRANSMIT_DESC_SIZE] __nocache __aligned(64);
+DmaDesc rx_desc[GMAC_CNT][RECEIVE_DESC_SIZE] __nocache __aligned(64);
+struct sk_buff tx_buf[GMAC_CNT][TRANSMIT_DESC_SIZE] __nocache __aligned(64);
+struct sk_buff rx_buf[GMAC_CNT][RECEIVE_DESC_SIZE] __nocache __aligned(64);
+#else
 extern struct sk_buff tx_buf[GMAC_CNT][TRANSMIT_DESC_SIZE];
 extern struct sk_buff rx_buf[GMAC_CNT][RECEIVE_DESC_SIZE];
+#endif
 
 static uint32_t eth_phy_addr;
 
@@ -167,33 +176,31 @@ static int reset_phy(synopGMACdevice *gmacdev)
 
 static void m_numaker_read_mac_addr(char *mac)
 {
+#if DT_INST_PROP(0, zephyr_random_mac_address)
+	gen_random_mac(mac, NUMAKER_OUI_B0, NUMAKER_OUI_B1, NUMAKER_OUI_B2);
+#else
 	uint32_t uid1;
-	/* Fetch word 0 of data flash */
-	uint32_t word0 = *(uint32_t *)(NUMAKER_DATA_FLASH + 0x04U);
+	uint32_t word0;
 	/*
-	 * Fetch word 1 of data flash
 	 * we only want bottom 16 bits of word1 (MAC bits 32-47)
 	 * and bit 9 forced to 1, bit 8 forced to 0
 	 * Locally administered MAC, reduced conflicts
 	 * http://en.wikipedia.org/wiki/MAC_address
 	 */
-	uint32_t word1 = *(uint32_t *)NUMAKER_DATA_FLASH;
-
-	/* Not burn any mac address at the beginning of data flash */
-	if (word0 == NUMAKER_MASK_32) {
-		/* Generate a semi-unique MAC address from the UUID */
-		SYS_UnlockReg();
-		/* Enable FMC ISP function */
-		FMC_Open();
-		uid1 = FMC_ReadUID(1);
-		word1 = (uid1 & 0x003FFFFF) | ((uid1 & 0x030000) << 6) >> 8;
-		word0 = ((FMC_ReadUID(0) >> 4) << 20) | ((uid1 & 0xFF) << 12) |
-			(FMC_ReadUID(2) & 0xFFF);
-		/* Disable FMC ISP function */
-		FMC_Close();
-		/* Lock protected registers */
-		SYS_LockReg();
-	}
+	uint32_t word1;
+
+	/* Generate a semi-unique MAC address from the UUID */
+	SYS_UnlockReg();
+	/* Enable FMC ISP function */
+	FMC_Open();
+	uid1 = FMC_ReadUID(1);
+	word1 = (uid1 & 0x003FFFFF) | ((uid1 & 0x030000) << 6) >> 8;
+	word0 = ((FMC_ReadUID(0) >> 4) << 20) | ((uid1 & 0xFF) << 12) |
+		(FMC_ReadUID(2) & 0xFFF);
+	/* Disable FMC ISP function */
+	FMC_Close();
+	/* Lock protected registers */
+	SYS_LockReg();
 
 	word1 |= 0x00000200;
 	word1 &= 0x0000FEFF;
@@ -204,7 +211,7 @@ static void m_numaker_read_mac_addr(char *mac)
 	mac[3] = (word0 & 0x00ff0000) >> 16;
 	mac[4] = (word0 & 0x0000ff00) >> 8;
 	mac[5] = (word0 & 0x000000ff);
-
+#endif
 	LOG_INF("mac address %02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3],
 	       mac[4], mac[5]);
 }

drivers/ethernet/eth_numaker_priv.h

@@ -15,4 +15,9 @@
 
 #define NU_ETH_MTU_SIZE              1500
 
+/* NuMaker chip's OUI*/
+#define NUMAKER_OUI_B0 0xDA
+#define NUMAKER_OUI_B1 0x00
+#define NUMAKER_OUI_B2 0x53
+
 #endif /* ZEPHYR_DRIVERS_ETHERNET_ETH_NUMAKER_PRIV_H_ */

dts/arm/nuvoton/m55m1x.dtsi

@@ -335,6 +335,16 @@
 			#size-cells = <0>;
 			status = "disabled";
 		};
+
+		emac: ethernet@40208000 {
+			compatible = "nuvoton,numaker-ethernet";
+			reg = <0x40208000 0x2000>;
+			interrupts = <63 0>;
+			resets = <&rst NUMAKER_SYS_EMAC0RST>;
+			phy-addr = <0>;
+			clocks = <&pcc NUMAKER_EMAC0_MODULE 0 0>;
+			status = "disabled";
+		};
 	};
 };
 

west.yml

@@ -198,7 +198,7 @@ manifest:
       groups:
         - hal
     - name: hal_nuvoton
-      revision: 8eec051270fe45c3f9a1a12de60220e1ab26b579
+      revision: be1042dc8a96ebe9ea4c5d714f07c617539106d6
       path: modules/hal/nuvoton
       groups:
         - hal