1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* (C) Copyright 2011 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Nikita Kiryanov <nikita@compulab.co.il>
* Igor Grinberg <grinberg@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#define EEPROM_LAYOUT_VER_OFFSET 44
#define BOARD_SERIAL_OFFSET 20
#define BOARD_SERIAL_OFFSET_LEGACY 8
#define BOARD_REV_OFFSET 0
#define BOARD_REV_OFFSET_LEGACY 6
#define BOARD_REV_SIZE 2
#define MAC_ADDR_OFFSET 4
#define MAC_ADDR_OFFSET_LEGACY 0
#define LAYOUT_INVALID 0
#define LAYOUT_LEGACY 0xff
static int cl_eeprom_layout; /* Implicitly LAYOUT_INVALID */
static int cl_eeprom_read(uint offset, uchar *buf, int len)
{
return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
}
static int cl_eeprom_setup_layout(void)
{
int res;
if (cl_eeprom_layout != LAYOUT_INVALID)
return 0;
res = cl_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
(uchar *)&cl_eeprom_layout, 1);
if (res) {
cl_eeprom_layout = LAYOUT_INVALID;
return res;
}
if (cl_eeprom_layout == 0 || cl_eeprom_layout >= 0x20)
cl_eeprom_layout = LAYOUT_LEGACY;
return 0;
}
void get_board_serial(struct tag_serialnr *serialnr)
{
u32 serial[2];
uint offset;
memset(serialnr, 0, sizeof(*serialnr));
if (cl_eeprom_setup_layout())
return;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
if (cl_eeprom_read(offset, (uchar *)serial, 8))
return;
if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
serialnr->low = serial[0];
serialnr->high = serial[1];
}
}
/*
* Routine: cl_eeprom_read_mac_addr
* Description: read mac address and store it in buf.
*/
int cl_eeprom_read_mac_addr(uchar *buf)
{
uint offset;
if (cl_eeprom_setup_layout())
return 0;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
return cl_eeprom_read(offset, buf, 6);
}
/*
* Routine: cl_eeprom_get_board_rev
* Description: read system revision from eeprom
*/
u32 cl_eeprom_get_board_rev(void)
{
u32 rev = 0;
char str[5]; /* Legacy representation can contain at most 4 digits */
uint offset = BOARD_REV_OFFSET_LEGACY;
if (cl_eeprom_setup_layout())
return 0;
if (cl_eeprom_layout != LAYOUT_LEGACY)
offset = BOARD_REV_OFFSET;
if (cl_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
return 0;
/*
* Convert legacy syntactic representation to semantic
* representation. i.e. for rev 1.00: 0x100 --> 0x64
*/
if (cl_eeprom_layout == LAYOUT_LEGACY) {
sprintf(str, "%x", rev);
rev = simple_strtoul(str, NULL, 10);
}
return rev;
};
|
