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Merge pull request #318 from bloqaudio/pr/mac-from-flash

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machine: optionally read the factory MAC from flash
This commit is contained in:
logicog
2026-08-11 14:32:32 +02:00
committed by GitHub
parent 7f3c91ac0c 3853a2701d
commit 5e30f8e6c0
3 changed files with 24 additions and 14 deletions
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machine.c
+1
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@@ -415,6 +415,7 @@ void machine_custom_init(void) { }
__code const struct machine machine = {
.machine_name = "SWTGW218AS 8+1 Managed Switch",
.isRTL8373 = 1,
.mac_flash_offset = 0x1FC000,
.min_port = 0,
.max_port = 8,
.n_sfp = 1,
machine.h
+1
View File
@@ -85,6 +85,7 @@ typedef struct machine {
uint32_t led_sets[4][4];
uint8_t led_mux_custom;
uint8_t led_mux[28];
uint32_t mac_flash_offset;
};
typedef struct machine_runtime
rtlplayground.c
+14 -6
View File
@@ -2112,20 +2112,28 @@ void main(void)
uip_ipaddr(&uip_hostaddr, ownIP[0], ownIP[1], ownIP[2], ownIP[3]);
uip_ipaddr(&uip_draddr, gatewayIP[0], gatewayIP[1], gatewayIP[2], gatewayIP[3]);
uip_ipaddr(&uip_netmask, netmask[0], netmask[1], netmask[2], netmask[3]);
uip_ethaddr.addr[0] = 0xff;
if (machine.mac_flash_offset) {
flash_region.addr = machine.mac_flash_offset;
flash_region.len = FLASH_BUF_SIZE;
flash_read_bulk(flash_buf);
// accept only a real unicast, globally-administered address (reject blank/LAA/multicast/all-zero OUI)
if (flash_buf[0] != 0xff && !(flash_buf[0] & 0x03) && (flash_buf[0] | flash_buf[1] | flash_buf[2])) {
uip_ethaddr.addr[0] = flash_buf[0]; uip_ethaddr.addr[1] = flash_buf[1];
uip_ethaddr.addr[2] = flash_buf[2]; uip_ethaddr.addr[3] = flash_buf[3];
uip_ethaddr.addr[4] = flash_buf[4]; uip_ethaddr.addr[5] = flash_buf[5];
}
}
if (uip_ethaddr.addr[0] == 0xff) { // no valid flash MAC -> generate locally-administered
reg_read_m(RTL837X_REG_CHIP_UUID);
#ifdef DEBUG
print_string("SoC UUID: "); print_sfr_data();
#endif
uip_ethaddr.addr[0] = 0x06; // LAA prefix
uip_ethaddr.addr[3] = sfr_data[0] ^ sfr_data[3];
uip_ethaddr.addr[4] = sfr_data[1] ^ sfr_data[3];
uip_ethaddr.addr[5] = sfr_data[2] ^ sfr_data[3];
reg_read_m(RTL837X_REG_CHIP_LOT_NO);
#ifdef DEBUG
print_string(", LOT: "); print_sfr_data(); write_char(' ');
#endif
uip_ethaddr.addr[1] = sfr_data[0] ^ sfr_data[2];
uip_ethaddr.addr[2] = sfr_data[1] ^ sfr_data[3];
}
print_string("Setting MAC to: ");
print_byte(uip_ethaddr.addr[0]); write_char(':'); print_byte(uip_ethaddr.addr[1]); write_char(':');
print_byte(uip_ethaddr.addr[2]); write_char(':'); print_byte(uip_ethaddr.addr[3]); write_char(':');