board: ti: am62ax: evm.c: Add EEPROM associated features

Add functions to support features such as detecting the board from the
EEPROM as well as fetching the MAC address from EEPROM.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/board/ti/am62ax/evm.c b/board/ti/am62ax/evm.c
index f5c2f46884..a7c3d43e43 100644
--- a/board/ti/am62ax/evm.c
+++ b/board/ti/am62ax/evm.c
@@ -55,6 +55,94 @@ int board_fit_config_name_match(const char *name)
 #define CTRLMMR_USB1_PHY_CTRL	0x43004018
 #define CORE_VOLTAGE		0x80000000
 
+#ifdef CONFIG_TI_I2C_BOARD_DETECT
+int do_board_detect(void)
+{
+	int ret;
+
+	ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
+					 CONFIG_EEPROM_CHIP_ADDRESS);
+	if (ret) {
+		printf("EEPROM not available at 0x%02x, trying to read at 0x%02x\n",
+		       CONFIG_EEPROM_CHIP_ADDRESS, CONFIG_EEPROM_CHIP_ADDRESS + 1);
+		ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
+						 CONFIG_EEPROM_CHIP_ADDRESS + 1);
+		if (ret)
+			pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
+			       CONFIG_EEPROM_CHIP_ADDRESS + 1, ret);
+	}
+
+	return ret;
+}
+
+int checkboard(void)
+{
+	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+
+	if (!do_board_detect())
+		printf("Board: %s rev %s\n", ep->name, ep->version);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_BOARD_LATE_INIT
+static void setup_board_eeprom_env(void)
+{
+	char *name = "am62ax_skevm";
+
+	if (do_board_detect())
+		goto invalid_eeprom;
+
+	if (board_is_am62ax_skevm())
+		name = "am62ax_skevm";
+	else
+		printf("Unidentified board claims %s in eeprom header\n",
+		       board_ti_get_name());
+
+invalid_eeprom:
+	set_board_info_env_am6(name);
+}
+
+static void setup_serial(void)
+{
+	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+	unsigned long board_serial;
+	char *endp;
+	char serial_string[17] = { 0 };
+
+	if (env_get("serial#"))
+		return;
+
+	board_serial = simple_strtoul(ep->serial, &endp, 16);
+	if (*endp != '\0') {
+		pr_err("Error: Can't set serial# to %s\n", ep->serial);
+		return;
+	}
+
+	snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
+	env_set("serial#", serial_string);
+}
+
+int board_late_init(void)
+{
+	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
+		struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+
+		setup_board_eeprom_env();
+		setup_serial();
+		/*
+		 * The first MAC address for ethernet a.k.a. ethernet0 comes from
+		 * efuse populated via the am654 gigabit eth switch subsystem driver.
+		 * All the other ones are populated via EEPROM, hence continue with
+		 * an index of 1.
+		 */
+		board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
+	}
+	return 0;
+}
+#endif
+
 #if defined(CONFIG_SPL_BOARD_INIT)
 void spl_board_init(void)
 {