1 files changed, 78 insertions, 1 deletions
diff --git a/board/dhelectronics/common/dh_common.h b/board/dhelectronics/common/dh_common.h
index a2de5b1553e..c4693c60618 100644
--- a/board/dhelectronics/common/dh_common.h
+++ b/board/dhelectronics/common/dh_common.h
@@ -3,6 +3,52 @@
  * Copyright 2022 DENX Software Engineering GmbH, Philip Oberfichtner <pro@denx.de>
  */
 
+#define DH_EEPROM_ID_PAGE_MAX_SIZE	64
+
+enum eip_request_values {
+	DH_MAC0,
+	DH_MAC1,
+	DH_ITEM_NUMBER,
+	DH_SERIAL_NUMBER,
+};
+
+/* DH item: Vendor coding */
+#define DH_ITEM_PREFIX_NXP	0x01
+#define DH_ITEM_PREFIX_NXP_CHR	'I'
+#define DH_ITEM_PREFIX_ST	0x02
+#define DH_ITEM_PREFIX_ST_CHR	'S'
+
+/*
+ * DH item: Finished state coding
+ * Bit = 0 means half finished
+ *         Prefix is 'H'
+ * Bit = 1 means finished with a customer image flashed
+ *         Prefix is 'F'
+ */
+#define DH_ITEM_PREFIX_FIN_BIT		BIT(7)
+#define DH_ITEM_PREFIX_FIN_HALF_CHR	'H'
+#define DH_ITEM_PREFIX_FIN_FLASHED_CHR	'F'
+
+struct eeprom_id_page {
+	/* Header */
+	struct {
+		u8	id[3];		/* Identifier 'D', 'H', 'E' - 'D' is at index 0 */
+		u8	version;	/* 0x10 -- Version 1.0 */
+		u8	crc16_pl[2];	/* Checksum payload, [1] is MSbyte */
+		u8	crc8_hdr;	/* Checksum header */
+	} hdr;
+	/* Payload */
+	struct {
+		u8	mac0[6];
+		u8	mac1[6];
+		u8	item_prefix;	/* H/F is coded in MSbits, Vendor coding starts at LSbits */
+		u8	item_num[3];	/* [2] is MSbyte */
+		u8	serial[9];	/* [8] is MSbyte */
+	} pl;
+};
+
+#define DH_EEPROM_ID_PAGE_V1_0		0x10
+
 /*
  * dh_mac_is_in_env - Check if MAC address is already set
  *
@@ -29,8 +75,39 @@ int dh_get_mac_is_enabled(const char *alias);
 int dh_get_mac_from_eeprom(unsigned char *enetaddr, const char *alias);
 
 /*
+ * dh_read_eeprom_id_page() - Read EEPROM ID page content into given buffer
+ * @eeprom_buffer:	Buffer for EEPROM ID page content
+ * @alias:		Alias for EEPROM ID page device tree node
+ *
+ * Read the content of the EEPROM ID page into the given buffer (parameter
+ * eeprom_buffer). The EEPROM ID page device is selected via alias device
+ * tree name (parameter alias). The data of the EEPROM ID page is verified.
+ * An error is returned for reading failures and invalid data.
+ *
+ * Return: 0 if OK, other value on error
+ */
+int dh_read_eeprom_id_page(u8 *eeprom_buffer, const char *alias);
+
+/*
+ * dh_get_value_from_eeprom_buffer() - Get value from EEPROM buffer
+ * @eip_request_values:	Requested value as enum
+ * @data:		Buffer where value is to be stored
+ * @data_len:		Length of the value buffer
+ * @eip:		Pointer to EEPROM ID page struct from which the data is parsed
+ *
+ * Gets the value specified by the parameter eip_request_values from the EEPROM
+ * data struct (parameter eip). The data is written to the specified data
+ * buffer (parameter data). If the length of the data (parameter data_len) is
+ * not sufficient to copy the data into the buffer, an error is returned.
+ *
+ * Return: 0 if OK, other value on error
+ */
+int dh_get_value_from_eeprom_buffer(enum eip_request_values request, u8 *data, int data_len,
+				    struct eeprom_id_page *eip);
+
+/*
  * dh_setup_mac_address - Try to get MAC address from various locations and write it to env
  *
  * Return: 0 if OK, other value on error
  */
-int dh_setup_mac_address(void);
+int dh_setup_mac_address(struct eeprom_id_page *eip);