diff options
| author | Sam Protsenko <semen.protsenko@linaro.org> | 2025-08-06 17:27:02 -0500 |
|---|---|---|
| committer | Minkyu Kang <mk7.kang@samsung.com> | 2025-09-01 16:37:12 +0900 |
| commit | cb64735bdd487ebc6f8eff790bd966152e9e466b (patch) | |
| tree | d13440f99b1c4e84ce4af660edaa044dfd669da9 | |
| parent | 3b36c242eb338f19c4436f5deba66a65ee85071d (diff) | |
board: samsung: e850-96: Set ethaddr
Set the environment variable for Ethernet MAC address (ethaddr). Use the
SoC ID to make sure it's unique. It'll be formatted in a way that
follows the consecutive style of the serial number ("serial#" variable),
i.e.:
OTP_CHIPID0 = 0xf51c8113
OTP_CHIPID1 = 0x236
get_chip_id() = 0x236f51c8113
serial# = 00000236f51c8113
ethaddr = 02:36:f5:1c:81:13
where corresponding bytes of the MAC address are:
mac_addr[0] = 0x02 // OTP_CHIPID1[15:8]
mac_addr[1] = 0x36 // OTP_CHIPID1[7:0]
mac_addr[2] = 0xf5 // OTP_CHIPID0[31:24]
mac_addr[3] = 0x1c // OTP_CHIPID0[23:16]
mac_addr[4] = 0x81 // OTP_CHIPID0[15:8]
mac_addr[5] = 0x13 // OTP_CHIPID0[7:0]
because OTP_CHIPID1 has only 16 significant bits (with actual ID
values), and all 32 bits of OTP_CHIPID0 are significant.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| -rw-r--r-- | board/samsung/e850-96/e850-96.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/board/samsung/e850-96/e850-96.c b/board/samsung/e850-96/e850-96.c index a6c264d1248..d489716bfdf 100644 --- a/board/samsung/e850-96/e850-96.c +++ b/board/samsung/e850-96/e850-96.c @@ -8,6 +8,7 @@ #include <env.h> #include <init.h> #include <mapmem.h> +#include <net.h> #include <asm/io.h> #include "fw.h" @@ -92,11 +93,35 @@ static void setup_serial(void) env_set("serial#", serial_str); } +static void setup_ethaddr(void) +{ + u64 serial_num; + u32 mac_hi, mac_lo; + u8 mac_addr[6]; + + if (env_get("ethaddr")) + return; + + serial_num = get_chip_id(); + mac_lo = (u32)serial_num; /* OTP_CHIPID0 */ + mac_hi = (u32)(serial_num >> 32UL); /* OTP_CHIPID1 */ + mac_addr[0] = (mac_hi >> 8) & 0xff; + mac_addr[1] = mac_hi & 0xff; + mac_addr[2] = (mac_lo >> 24) & 0xff; + mac_addr[3] = (mac_lo >> 16) & 0xff; + mac_addr[4] = (mac_lo >> 8) & 0xff; + mac_addr[5] = mac_lo & 0xff; + mac_addr[0] &= ~0x1; /* make sure it's not a multicast address */ + if (is_valid_ethaddr(mac_addr)) + eth_env_set_enetaddr("ethaddr", mac_addr); +} + int board_late_init(void) { int err; setup_serial(); + setup_ethaddr(); /* * Do this in board_late_init() to make sure MMC is not probed before |