risc-v/mpfs: add support for ethernet

arch/risc-v/src/mpfs/Kconfig

@@ -244,6 +244,26 @@ config MPFS_EMMCSD
 	---help---
 		Selects the MPFS eMMCSD driver.
 
+config MPFS_ETHMAC
+	bool
+	default n
+	select NETDEVICES
+	select ARCH_HAVE_PHY
+
+config MPFS_ETHMAC_0
+	bool "Ethernet MAC 0"
+	default n
+	select MPFS_ETHMAC
+	---help---
+		Enable MPFS ethernet MAC-0.
+
+config MPFS_ETHMAC_1
+	bool "Ethernet MAC 1"
+	default n
+	select MPFS_ETHMAC
+	---help---
+		Enable MPFS ethernet MAC-1.
+
 comment "CorePWM Options"
 
 config MPFS_HAVE_COREPWM
@@ -317,10 +337,149 @@ config MPFS_DMA
 	---help---
 		Enable DMA Support. MPFS DMA is Memory-to-Memory only.
 
-menu "MPFS Others"
+menu "Ethernet MAC configuration"
+	depends on MPFS_ETHMAC
+
+choice
+	prompt "MII Interface mode"
+
+config MPFS_MAC_SGMII
+	bool "SGMII"
+	---help---
+		Use Ethernet SGMII interface.
+
+config MPFS_MAC_GMII
+	bool "GMII"
+	---help---
+		Use Ethernet GMII interface.
+endchoice
+
+config MPFS_PHYADDR
+	int "PHY address"
+	default 1
+	---help---
+		The 5-bit address of the PHY on the board.  Default: 1
+
+config MPFS_MAC_NO_BROADCAST
+	bool "Disable Broadcast"
+	default n
+	---help---
+		Select to disable receipt of broadcast packets.
+
+config MPFS_MAC_AUTONEG
+	bool "Use autonegotiation"
+	default y
+	---help---
+		Use PHY autonegotiation to determine speed and mode
+
+config MPFS_MAC_AUTONEG_DISABLE_1000MBPS
+	bool "Disable Gigabit mode"
+	default n
+	depends on MPFS_MAC_AUTONEG
+	---help---
+		Select to disable Gigabit speed support.
+		If disabled then autonegotiation don't advertise 1GB mode
+
+config MPFS_PHYINIT
+	bool "Use board phyinit"
+	default n
+	---help---
+		call mpfs_phy_boardinitialize() on init
+
+if !MPFS_MAC_AUTONEG
+
+config MPFS_MAC_ETHFD
+	bool "Full duplex"
+	default n
+	---help---
+		If MPFS_MAC_AUTONEG is not defined, then this may be defined to
+		select full duplex mode. Default: half-duplex
+
+choice
+	prompt "MAC Speed"
+	default MPFS_MAC_ETH100MBPS
+	---help---
+		If autonegotiation is not used, then you must select the fixed speed
+		of the PHY
+
+config MPFS_MAC_ETH10MBPS
+	bool "10 Mbps"
+	---help---
+		If MPFS_MAC_AUTONEG is not defined, then this may be defined to select 10 MBps
+		speed.  Default: 100 Mbps
+
+config MPFS_MAC_ETH100MBPS
+	bool "100 Mbps"
+	---help---
+		If MPFS_MAC_AUTONEG is not defined, then this may be defined to select 100 MBps
+		speed.  Default: 100 Mbps
+
+config MPFS_MAC_ETH1000MBPS
+	bool "1000 Mbps"
+	---help---
+		If MPFS_MAC_AUTONEG is not defined, then this may be defined to select 1000 MBps
+		speed.  Default: 100 Mbps
+
+endchoice # GMAC speed
+
+endif # !MPFS_MAC_AUTONEG
+
+config MPFS_ETHMAC_MDC_CLOCK_SOURCE_HZ
+	int "MDC Clock Source (Hz)"
+	default 125000000
+	range 1000000 240000000
+	depends on MPFS_ETHMAC
+	---help---
+		Select the MDC clock source frequency.
+
+config MPFS_ETHMAC_NTXBUFFERS
+	int "Number of TX DMA Buffers"
+	default 8
+	depends on MPFS_ETHMAC
+	---help---
+		Select the number of TX DMA buffers.
+
+config MPFS_ETHMAC_NRXBUFFERS
+	int "Number of RX DMA Buffers"
+	default 16
+	depends on MPFS_ETHMAC
+	---help---
+		Select the number of RX DMA buffers.
+
+config MPFS_ETHMAC_64BIT_ADDRESS_MODE
+	bool "64-bit DMA address mode"
+	default n
+	depends on MPFS_ETHMAC
+	---help---
+		Select to enable 64-bit DMA address mode. This is only needed if the
+		Nuttx memory address is above 4GB.
+
+config MPFS_ETHMAC_REGDEBUG
+	bool "Register-Level Debug"
+	default n
+	depends on DEBUG_NET_INFO
+	---help---
+		Enable very low-level register access debug.  Depends on
+		CONFIG_DEBUG_FEATURES.
+
+config MPFS_MPU_DMA_ENABLE
+	bool "Enable ALL memory access for eth DMA"
+	default n
+	---help---
+		Set ALL memory accessible for Ethernet DMA.
+		This should be done on bootloader. This is mostly for testing only.
 
 endmenu
 
+config MPFS_HAVE_CORERMII
+	bool "CoreRMII FPGA IP block configured"
+	default n
+
+config MPFS_CORERMII_ADDRESS
+	int "CoreRMII Phy address"
+	default 1
+	depends on MPFS_HAVE_CORERMII
+
 # Override the default values for MPU / PMP parameters here
 
 config ARCH_MPU_MIN_BLOCK_SIZE

arch/risc-v/src/mpfs/Make.defs

@@ -93,6 +93,10 @@ ifeq ($(CONFIG_MPFS_EMMCSD),y)
 CHIP_CSRCS += mpfs_emmcsd.c
 endif
 
+ifeq ($(CONFIG_MPFS_ETHMAC),y)
+CHIP_CSRCS += mpfs_ethernet.c
+endif
+
 ifeq (${CONFIG_MPFS_HAVE_COREPWM},y)
 CHIP_CSRCS += mpfs_corepwm.c
 endif

arch/risc-v/src/mpfs/mpfs_ethernet.h

@@ -0,0 +1,97 @@
+/****************************************************************************
+ * arch/risc-v/src/mpfs/mpfs_ethernet.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_MPFS_MPFS_ETHERNET_H
+#define __ARCH_RISCV_SRC_MPFS_MPFS_ETHERNET_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "hardware/mpfs_ethernet.h"
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Function: mpfs_ethinitialize
+ *
+ * Description:
+ *   Initialize the Ethernet driver for one interface.
+ *
+ * Input Parameters:
+ *   intf - In the case where there are multiple EMACs, this value
+ *          identifies which EMAC is to be initialized.
+ *
+ * Returned Value:
+ *   OK on success; Negated errno on failure.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int mpfs_ethinitialize(int intf);
+
+/****************************************************************************
+ * Function: mpfs_phy_boardinitialize
+ *
+ * Description:
+ *   Some boards require specialized initialization of the PHY before it can
+ *   be used. This may include such things as configuring GPIOs, resetting
+ *   the PHY, etc.  If CONFIG_MPFS_PHYINIT is defined in the configuration
+ *   then the board specific logic must provide mpfs_phyinitialize();
+ *   The MPFS Ethernet driver will call this function one time before
+ *   it first uses the PHY.
+ *
+ * Input Parameters:
+ *   intf - Always zero for now.
+ *
+ * Returned Value:
+ *   OK on success; Negated errno on failure.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_MPFS_PHYINIT
+int mpfs_phy_boardinitialize(int intf);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_RISCV_SRC_MPFS_MPFS_ETHERNET_H */