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 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
25 #define EEPROM_LAYOUT_VER_OFFSET 44
26 #define BOARD_SERIAL_OFFSET 20
27 #define BOARD_SERIAL_OFFSET_LEGACY 8
28 #define BOARD_REV_OFFSET 0
29 #define BOARD_REV_OFFSET_LEGACY 6
30 #define BOARD_REV_SIZE 4
31 #define BOARD_REV_SIZE_LEGACY 2
33 #define LAYOUT_INVALID 0
34 #define LAYOUT_LEGACY 0xff
36 static int eeprom_layout; /* Implicitly LAYOUT_INVALID */
38 static int cm_t3x_eeprom_read(uint offset, uchar *buf, int len)
40 return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
41 CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
44 static int eeprom_setup_layout(void)
48 if (eeprom_layout != LAYOUT_INVALID)
51 res = cm_t3x_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
52 (uchar *)&eeprom_layout, 1);
54 eeprom_layout = LAYOUT_INVALID;
58 if (eeprom_layout == 0 || eeprom_layout >= 0x20)
59 eeprom_layout = LAYOUT_LEGACY;
64 void get_board_serial(struct tag_serialnr *serialnr)
69 memset(serialnr, 0, sizeof(*serialnr));
70 if (eeprom_setup_layout())
73 offset = (eeprom_layout != LAYOUT_LEGACY) ?
74 BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
75 if (cm_t3x_eeprom_read(offset, (uchar *)serial, 8))
78 if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
79 serialnr->low = serial[0];
80 serialnr->high = serial[1];
85 * Routine: get_board_rev
86 * Description: read system revision
88 u32 get_board_rev(void)
91 uint offset = BOARD_REV_OFFSET_LEGACY;
92 int len = BOARD_REV_SIZE_LEGACY;
94 if (eeprom_setup_layout())
97 if (eeprom_layout != LAYOUT_LEGACY) {
98 offset = BOARD_REV_OFFSET;
102 if (cm_t3x_eeprom_read(offset, (uchar *)&rev, len))