2 * (C) Copyright 2011 CompuLab, Ltd. <www.compulab.co.il>
4 * Authors: Nikita Kiryanov <nikita@compulab.co.il>
5 * Igor Grinberg <grinberg@compulab.co.il>
7 * SPDX-License-Identifier: GPL-2.0+
13 #define EEPROM_LAYOUT_VER_OFFSET 44
14 #define BOARD_SERIAL_OFFSET 20
15 #define BOARD_SERIAL_OFFSET_LEGACY 8
16 #define BOARD_REV_OFFSET 0
17 #define BOARD_REV_OFFSET_LEGACY 6
18 #define BOARD_REV_SIZE 2
19 #define MAC_ADDR_OFFSET 4
20 #define MAC_ADDR_OFFSET_LEGACY 0
22 #define LAYOUT_INVALID 0
23 #define LAYOUT_LEGACY 0xff
25 static int eeprom_layout; /* Implicitly LAYOUT_INVALID */
27 static int cm_t3x_eeprom_read(uint offset, uchar *buf, int len)
29 return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
30 CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
33 static int eeprom_setup_layout(void)
37 if (eeprom_layout != LAYOUT_INVALID)
40 res = cm_t3x_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
41 (uchar *)&eeprom_layout, 1);
43 eeprom_layout = LAYOUT_INVALID;
47 if (eeprom_layout == 0 || eeprom_layout >= 0x20)
48 eeprom_layout = LAYOUT_LEGACY;
53 void get_board_serial(struct tag_serialnr *serialnr)
58 memset(serialnr, 0, sizeof(*serialnr));
59 if (eeprom_setup_layout())
62 offset = (eeprom_layout != LAYOUT_LEGACY) ?
63 BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
64 if (cm_t3x_eeprom_read(offset, (uchar *)serial, 8))
67 if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
68 serialnr->low = serial[0];
69 serialnr->high = serial[1];
74 * Routine: cm_t3x_eeprom_read_mac_addr
75 * Description: read mac address and store it in buf.
77 int cm_t3x_eeprom_read_mac_addr(uchar *buf)
81 if (eeprom_setup_layout())
84 offset = (eeprom_layout != LAYOUT_LEGACY) ?
85 MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
86 return cm_t3x_eeprom_read(offset, buf, 6);
90 * Routine: cm_t3x_eeprom_get_board_rev
91 * Description: read system revision from eeprom
93 u32 cm_t3x_eeprom_get_board_rev(void)
96 char str[5]; /* Legacy representation can contain at most 4 digits */
97 uint offset = BOARD_REV_OFFSET_LEGACY;
99 if (eeprom_setup_layout())
102 if (eeprom_layout != LAYOUT_LEGACY)
103 offset = BOARD_REV_OFFSET;
105 if (cm_t3x_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
109 * Convert legacy syntactic representation to semantic
110 * representation. i.e. for rev 1.00: 0x100 --> 0x64
112 if (eeprom_layout == LAYOUT_LEGACY) {
113 sprintf(str, "%x", rev);
114 rev = simple_strtoul(str, NULL, 10);