[U-Boot] [PATCH 15/18] ti: common: am6: Add support for setting MAC addresses

[Andreas Dannenberg <dannenberg@ti.com>]

The AM654x EVM based on the TI K3 family of SoCs has an updated board
detection EEPROM structure that contains a TLV record of dedicated MAC
addresses rather than a range of MAC addresses as it was used on earlier
platforms such as DRA7. Add a basic function that allows us setting up
Ethernet MAC addresses into the U-Boot environment based on the MAC
address record contained in the common TI EEPROM structure.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
---
 board/ti/common/board_detect.c | 32 ++++++++++++++++++++++++++++++++
 board/ti/common/board_detect.h | 12 ++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
index fea39f21e8..32fa10599e 100644
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -534,6 +534,25 @@ fail:
 	memset(mac_addr, 0, TI_EEPROM_HDR_ETH_ALEN);
 }
 
+void __maybe_unused
+board_ti_am6_get_eth_mac_addr(int index,
+			      u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN])
+{
+	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		goto fail;
+
+	if (index < 0 || index >= ep->mac_addr_cnt)
+		goto fail;
+
+	memcpy(mac_addr, ep->mac_addr[index], TI_EEPROM_HDR_ETH_ALEN);
+	return;
+
+fail:
+	memset(mac_addr, 0, TI_EEPROM_HDR_ETH_ALEN);
+}
+
 u64 __maybe_unused board_ti_get_emif1_size(void)
 {
 	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
@@ -667,6 +686,19 @@ void board_ti_set_ethaddr(int index)
 	}
 }
 
+void board_ti_am6_set_ethaddr(int index, int count)
+{
+	u8 mac_addr[6];
+	int i;
+
+	for (i = 0; i < count; i++) {
+		board_ti_am6_get_eth_mac_addr(i, mac_addr);
+		if (is_valid_ethaddr(mac_addr))
+			eth_env_set_enetaddr_by_index("eth", i + index,
+						      mac_addr);
+	}
+}
+
 bool __maybe_unused board_ti_was_eeprom_read(void)
 {
 	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
diff --git a/board/ti/common/board_detect.h b/board/ti/common/board_detect.h
index bf563c84c8..a45d8961b9 100644
--- a/board/ti/common/board_detect.h
+++ b/board/ti/common/board_detect.h
@@ -398,6 +398,18 @@ void set_board_info_env_am6(char *name);
  */
 void board_ti_set_ethaddr(int index);
 
+/**
+ * board_ti_am6_set_ethaddr- Sets the ethaddr environment from EEPROM
+ * @index: The first eth<index>addr environment variable to set
+ * @count: The number of MAC addresses to process
+ *
+ * EEPROM should be already read before calling this function. The EEPROM
+ * contains n dedicated MAC addresses. This function sets the ethaddr
+ * environment variable for all the available MAC addresses starting
+ * from eth<index>addr.
+ */
+void board_ti_am6_set_ethaddr(int index, int count);
+
 /**
  * board_ti_was_eeprom_read() - Check to see if the eeprom contents have been read
  *
-- 
2.17.1