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From 7a969112a87c8c6037f07e952213e8696af41c35 Mon Sep 17 00:00:00 2001
From: Philippe Schenker <philippe.schenker@toradex.com>
Date: Mon, 20 Jun 2022 16:57:45 +0200
Subject: [PATCH 4/5] toradex: tdx-cfg-block: add new toradex oui range
Add new Toradex MAC OUI (8c:06:cb), to the config block. With this change
we extend the possible serial-numbers as follows:
For serial-numbers 00000000-16777215 OUI 00:14:2d is taken
For serial-numbers 16777216-33554431 OUI 8c:06:cb is taken
Lower 24-bit of the serial number are used in the NIC part of the
MAC address, the complete serial number can be calculated using the OUI.
Upstream-Status: Backport [1cf4e79f5776e9cc451b7f4affec7e47db9533f9]
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
---
board/toradex/common/tdx-cfg-block.c | 42 +++++++++++++++++++++++++---
board/toradex/common/tdx-cfg-block.h | 2 ++
board/toradex/common/tdx-common.c | 5 +---
3 files changed, 41 insertions(+), 8 deletions(-)
diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index 678d4e07c21..9305709a3c0 100644
--- a/board/toradex/common/tdx-cfg-block.c
+++ b/board/toradex/common/tdx-cfg-block.c
@@ -159,6 +159,42 @@ const char * const toradex_display_adapters[] = {
[159] = "Verdin DSI to LVDS Adapter",
};
+const u32 toradex_ouis[] = {
+ [0] = 0x00142dUL,
+ [1] = 0x8c06cbUL,
+};
+
+static u32 get_serial_from_mac(struct toradex_eth_addr *eth_addr)
+{
+ int i;
+ u32 oui = ntohl(eth_addr->oui) >> 8;
+ u32 nic = ntohl(eth_addr->nic) >> 8;
+
+ for (i = 0; i < ARRAY_SIZE(toradex_ouis); i++) {
+ if (toradex_ouis[i] == oui)
+ break;
+ }
+
+ return (u32)((i << 24) + nic);
+}
+
+void get_mac_from_serial(u32 tdx_serial, struct toradex_eth_addr *eth_addr)
+{
+ u8 oui_index = tdx_serial >> 24;
+ u32 nic = tdx_serial & GENMASK(23, 0);
+ u32 oui;
+
+ if (oui_index >= ARRAY_SIZE(toradex_ouis)) {
+ puts("Can't find OUI for this serial#\n");
+ oui_index = 0;
+ }
+
+ oui = toradex_ouis[oui_index];
+
+ eth_addr->oui = htonl(oui << 8);
+ eth_addr->nic = htonl(nic << 8);
+}
+
#ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_MMC
static int tdx_cfg_block_mmc_storage(u8 *config_block, int write)
{
@@ -331,8 +367,7 @@ int read_tdx_cfg_block(void)
memcpy(&tdx_eth_addr, config_block + offset,
6);
- /* NIC part of MAC address is serial number */
- tdx_serial = ntohl(tdx_eth_addr.nic) >> 8;
+ tdx_serial = get_serial_from_mac(&tdx_eth_addr);
break;
case TAG_HW:
memcpy(&tdx_hw_tag, config_block + offset, 8);
@@ -974,8 +1009,7 @@ static int do_cfgblock_create(struct cmd_tbl *cmdtp, int flag, int argc,
}
/* Convert serial number to MAC address (the storage format) */
- tdx_eth_addr.oui = htonl(0x00142dUL << 8);
- tdx_eth_addr.nic = htonl(tdx_serial << 8);
+ get_mac_from_serial(tdx_serial, &tdx_eth_addr);
/* Valid Tag */
write_tag(config_block, &offset, TAG_VALID, NULL, 0);
diff --git a/board/toradex/common/tdx-cfg-block.h b/board/toradex/common/tdx-cfg-block.h
index 43e662e41da..17906984863 100644
--- a/board/toradex/common/tdx-cfg-block.h
+++ b/board/toradex/common/tdx-cfg-block.h
@@ -114,4 +114,6 @@ int read_tdx_cfg_block_carrier(void);
int try_migrate_tdx_cfg_block_carrier(void);
+void get_mac_from_serial(u32 tdx_serial, struct toradex_eth_addr *eth_addr);
+
#endif /* _TDX_CFG_BLOCK_H */
diff --git a/board/toradex/common/tdx-common.c b/board/toradex/common/tdx-common.c
index 5ad5d00a0d9..3798bf95378 100644
--- a/board/toradex/common/tdx-common.c
+++ b/board/toradex/common/tdx-common.c
@@ -20,8 +20,6 @@
#include <asm/setup.h>
#include "tdx-common.h"
-#define TORADEX_OUI 0x00142dUL
-
#define SERIAL_STR_LEN 8
#define MODULE_VER_STR_LEN 4 // V1.1
#define MODULE_REV_STR_LEN 3 // [A-Z] or #[26-99]
@@ -104,8 +102,7 @@ int show_board_info(void)
if (read_tdx_cfg_block()) {
printf("MISSING TORADEX CONFIG BLOCK\n");
- tdx_eth_addr.oui = htonl(TORADEX_OUI << 8);
- tdx_eth_addr.nic = htonl(tdx_serial << 8);
+ get_mac_from_serial(tdx_serial, &tdx_eth_addr);
checkboard();
} else {
snprintf(tdx_serial_str, sizeof(tdx_serial_str),
--
2.20.1
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