diff options
Diffstat (limited to 'board/dhelectronics/dh_stm32mp1/board.c')
| -rw-r--r-- | board/dhelectronics/dh_stm32mp1/board.c | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c index c9abe3cc6d..f42d395098 100644 --- a/board/dhelectronics/dh_stm32mp1/board.c +++ b/board/dhelectronics/dh_stm32mp1/board.c @@ -81,6 +81,11 @@ */ DECLARE_GLOBAL_DATA_PTR; +#define KS_CCR 0x08 +#define KS_CCR_EEPROM BIT(9) +#define KS_BE0 BIT(12) +#define KS_BE1 BIT(13) + int setup_mac_address(void) { unsigned char enetaddr[6]; @@ -97,12 +102,39 @@ int setup_mac_address(void) if (off < 0) { /* ethernet1 is not present in the system */ skip_eth1 = true; - } else { - ret = eth_env_get_enetaddr("eth1addr", enetaddr); - if (ret) /* eth1addr is already set */ - skip_eth1 = true; + goto out_set_ethaddr; + } + + ret = eth_env_get_enetaddr("eth1addr", enetaddr); + if (ret) { + /* eth1addr is already set */ + skip_eth1 = true; + goto out_set_ethaddr; + } + + ret = fdt_node_check_compatible(gd->fdt_blob, off, "micrel,ks8851-mll"); + if (ret) + goto out_set_ethaddr; + + /* + * KS8851 with EEPROM may use custom MAC from EEPROM, read + * out the KS8851 CCR register to determine whether EEPROM + * is present. If EEPROM is present, it must contain valid + * MAC address. + */ + u32 reg, ccr; + reg = fdt_get_base_address(gd->fdt_blob, off); + if (!reg) + goto out_set_ethaddr; + + writew(KS_BE0 | KS_BE1 | KS_CCR, reg + 2); + ccr = readw(reg); + if (ccr & KS_CCR_EEPROM) { + skip_eth1 = true; + goto out_set_ethaddr; } +out_set_ethaddr: if (skip_eth0 && skip_eth1) return 0; |