Due to a problem in Nios® II Software Build Tool, the default settings for Nios® II Simple Socket Server (RMII) template is not targeted to MARVELL PHY, which resulted in wrong PHY configurations causing Ethernet link down. This problem is observed in Nios® II SBT version 17.1 onwards.
To work around this problem the user is required to modify below parameters in template to enable MARVELL PHY RGMII configurations.
Browse to project directory: ../software/<project_name>/tse_my_system.c
Step 1. Uncomment the next definition:
/* if using marvell phy and you want rgmii mode, uncomment this define */
#define SET_MARVELL_RGMII_MODE //uncomment this definition to enable RGMII
#ifdef SET_MARVELL_RGMII_MODE
#define ADDITIONAL_PHY_CFG &marvell_cfg_rgmii
#else
#define ADDITIONAL_PHY_CFG 0
#endif
Step 2. Find the definition "ifdef DESCRIPTOR MEMORY BASE" and verify the first argument from function TSE_SYSTEM_EXT_MEM_NO_SHARED_FIFO to be declared as "ETH_TSE" and not as "TSE_0_TSE"
As shown in the next code portion:
#ifdef DESCRIPTOR_MEMORY_BASE
alt_tse_system_info tse_mac_device[MAXNETS] = {
TSE_SYSTEM_EXT_MEM_NO_SHARED_FIFO(ETH_TSE, 0, TSE_0_DMA_TX, TSE_0_DMA_RX, TSE_PHY_AUTO_ADDRESS, ADDITIONAL_PHY_CFG, DESCRIPTOR_MEMORY)
};
