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 2
31 #define MAC_ADDR_OFFSET 4
32 #define MAC_ADDR_OFFSET_LEGACY 0
34 #define LAYOUT_INVALID 0
35 #define LAYOUT_LEGACY 0xff
37 static int eeprom_layout; /* Implicitly LAYOUT_INVALID */
39 static int cm_t3x_eeprom_read(uint offset, uchar *buf, int len)
41 return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
42 CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
45 static int eeprom_setup_layout(void)
49 if (eeprom_layout != LAYOUT_INVALID)
52 res = cm_t3x_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
53 (uchar *)&eeprom_layout, 1);
55 eeprom_layout = LAYOUT_INVALID;
59 if (eeprom_layout == 0 || eeprom_layout >= 0x20)
60 eeprom_layout = LAYOUT_LEGACY;
65 void get_board_serial(struct tag_serialnr *serialnr)
70 memset(serialnr, 0, sizeof(*serialnr));
71 if (eeprom_setup_layout())
74 offset = (eeprom_layout != LAYOUT_LEGACY) ?
75 BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
76 if (cm_t3x_eeprom_read(offset, (uchar *)serial, 8))
79 if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
80 serialnr->low = serial[0];
81 serialnr->high = serial[1];
86 * Routine: cm_t3x_eeprom_read_mac_addr
87 * Description: read mac address and store it in buf.
89 int cm_t3x_eeprom_read_mac_addr(uchar *buf)
93 if (eeprom_setup_layout())
96 offset = (eeprom_layout != LAYOUT_LEGACY) ?
97 MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
98 return cm_t3x_eeprom_read(offset, buf, 6);
102 * Routine: cm_t3x_eeprom_get_board_rev
103 * Description: read system revision from eeprom
105 u32 cm_t3x_eeprom_get_board_rev(void)
108 char str[5]; /* Legacy representation can contain at most 4 digits */
109 uint offset = BOARD_REV_OFFSET_LEGACY;
111 if (eeprom_setup_layout())
114 if (eeprom_layout != LAYOUT_LEGACY)
115 offset = BOARD_REV_OFFSET;
117 if (cm_t3x_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
121 * Convert legacy syntactic representation to semantic
122 * representation. i.e. for rev 1.00: 0x100 --> 0x64
124 if (eeprom_layout == LAYOUT_LEGACY) {
125 sprintf(str, "%x", rev);
126 rev = simple_strtoul(str, NULL, 10);