drivers: ethernet: support npcm4xx ethernet

1. Jtag is disabled by default.
2. samples/net/sockets/dumb_http_server is used
   for testing. (optional)
3. Test result for reference:
   Local IP: 192.0.2.1
   Remote IP: 192.0.2.2
   uart:~$ net ping 192.0.2.2
   PING 192.0.2.2
   28 bytes from 192.0.2.2 to 192.0.2.1: icmp_seq=0 ttl=64 time=1 ms
   28 bytes from 192.0.2.2 to 192.0.2.1: icmp_seq=1 ttl=64 time=1 ms
   28 bytes from 192.0.2.2 to 192.0.2.1: icmp_seq=2 ttl=64 time=1 ms
4. The local and remote IPs could be changed in
   CONFIG_NET_CONFIG_MY_IPV4_ADDR and
   CONFIG_NET_CONFIG_PEER_IPV4_ADDR.

Signed-off-by: Tyrone Ting <[email protected]>

boards/arm/npcm400f_evb/fun_def_list.h

@@ -128,3 +128,7 @@ FUN_DEFINE(DT_NODELABEL(pinctrl_sgpio0_default), IOX1_LDSH, IOX1_DOUT, IOX1_DIN,
 #if DT_NODE_HAS_STATUS(DT_NODELABEL(sgpio1), okay) && CONFIG_SGPIO_NPCM4XX
 FUN_DEFINE(DT_NODELABEL(pinctrl_sgpio1_default), IOX2_LDSH, IOX2_DOUT, IOX2_DIN, IOX2_SCLK)
 #endif
+
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(emac), okay) && CONFIG_ETH_NPCM4XX
+FUN_DEFINE(DT_NODELABEL(pinctrl_emac_default), EMAC)
+#endif

boards/arm/npcm400f_evb/npcm400f_evb.dts

@@ -233,7 +233,7 @@
 	tdi-gpios = <&gpio0 1 (GPIO_PUSH_PULL | GPIO_ACTIVE_HIGH)>;
 	tdo-gpios = <&gpio0 2 (GPIO_ACTIVE_HIGH)>;
 	tms-gpios = <&gpio0 3 (GPIO_PUSH_PULL | GPIO_ACTIVE_HIGH)>;
-	status = "okay";
+	status = "disabled";
 };
 
 &i3c4 {
@@ -608,3 +608,7 @@
 		pin-offset = <120>;
 	};
 };
+
+&emac {
+	status = "okay";
+};

boards/arm/npcm400f_evb/npcm400f_evb_defconfig

@@ -99,9 +99,31 @@ CONFIG_USB=y
 CONFIG_USB_DC_NPCM4XX=y
 
 # JTAG Driver
-CONFIG_JTAG=y
-CONFIG_JTAG_SHELL=y
-CONFIG_JTAG_NPCM4XX=y
+CONFIG_JTAG=n
+CONFIG_JTAG_SHELL=n
+CONFIG_JTAG_NPCM4XX=n
 
 # SGPIO Driver
 CONFIG_SGPIO_NPCM4XX=n
+
+# EMAC Driver
+CONFIG_ETH_NPCM4XX=y
+
+# Networking config
+CONFIG_NETWORKING=y
+CONFIG_NET_L2_ETHERNET=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_IPV6=n
+CONFIG_NET_TCP=y
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_SHELL=y
+CONFIG_NET_TCP_ISN_RFC6528=n
+CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONFIG_AUTO_INIT=y
+CONFIG_NET_CONFIG_NEED_IPV4=y
+CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
+CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"
+CONFIG_NET_CONFIG_INIT_TIMEOUT=3
+
+# Network driver config
+CONFIG_TEST_RANDOM_GENERATOR=y

drivers/ethernet/CMakeLists.txt

@@ -22,6 +22,7 @@ zephyr_sources_ifdef(CONFIG_ETH_STM32_HAL	 eth_stm32_hal.c)
 zephyr_sources_ifdef(CONFIG_ETH_LITEETH		 eth_liteeth.c)
 zephyr_sources_ifdef(CONFIG_ETH_W5500		 eth_w5500.c)
 zephyr_sources_ifdef(CONFIG_DSA_KSZ8794		 dsa_ksz8794.c)
+zephyr_sources_ifdef(CONFIG_ETH_NPCM4XX	     eth_npcm4xx.c)
 
 if(CONFIG_ETH_NATIVE_POSIX)
 	zephyr_library()

drivers/ethernet/Kconfig

@@ -57,5 +57,6 @@ source "drivers/ethernet/Kconfig.liteeth"
 source "drivers/ethernet/Kconfig.gecko"
 source "drivers/ethernet/Kconfig.w5500"
 source "drivers/ethernet/Kconfig.dsa"
+source "drivers/ethernet/Kconfig.npcm4xx"
 
 endmenu # "Ethernet Drivers"

drivers/ethernet/Kconfig.npcm4xx

@@ -0,0 +1,71 @@
+# Nuvoton Ethernet driver configuration options
+
+# SPDX-License-Identifier: Apache-2.0
+
+DT_COMPAT_NUVOTON_NPCM4XX_ETHERNET := nuvoton,npcm4xx-ethernet
+
+config ETH_NPCM4XX
+	bool "Nuvoton NPCM4XX Ethernet driver"
+	depends on SOC_FAMILY_NPCM4XX
+	help
+	  This option enables the ethernet driver for NPCM4XX family of
+	  processors.
+	  Say y if you wish to use ethernet on NPCM4XX MCU.
+
+config ETH_NPCM4XX_RX_THREAD_STACK_SIZE
+	int "RX thread stack size"
+	default 4096
+	help
+	  RX thread stack size
+
+config ETH_NPCM4XX_RX_THREAD_PRIO
+	int "RX thread priority"
+	default 3
+	help
+	  RX thread priority
+
+config ETH_NPCM4XX_PHY_ADDRESS
+	int "Phy address"
+	default 1
+	help
+	  The phy address to use.
+
+config ETH_NPCM4XX_RANDOM_MAC
+	bool "Random MAC address"
+	depends on ENTROPY_GENERATOR
+	default y
+	help
+	  Generate a random MAC address dynamically.
+
+if !ETH_NPCM4XX_RANDOM_MAC
+
+config ETH_NPCM4XX_MAC3
+	hex "MAC Address Byte 3"
+	default 0
+	range 0 0xff
+	help
+	  This is the byte 3 of the MAC address.
+
+config ETH_NPCM4XX_MAC4
+	hex "MAC Address Byte 4"
+	default 0
+	range 0 0xff
+	help
+	  This is the byte 4 of the MAC address.
+
+config ETH_NPCM4XX_MAC5
+	hex "MAC Address Byte 5"
+	default 0
+	range 0 0xff
+	help
+	  This is the byte 5 of the MAC address.
+
+endif # !ETH_NPCM4XX_RANDOM_MAC
+
+config ETH_NPCM4XX_CARRIER_CHECK_RX_IDLE_TIMEOUT_MS
+	int "Carrier check timeout period (ms)"
+	default 500
+	range 100 30000
+	help
+	  Set the RX idle timeout period in milliseconds after which the
+	  PHY's carrier status is re-evaluated.