blob: 557d6329a4f0e815c65b06f9bf1ac4ead8d69f4c (
plain)
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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* I2C test
*
* For verifying the I2C bus, a full I2C bus scanning is performed.
*
* #ifdef CFG_SYS_POST_I2C_ADDRS
* The test is considered as passed if all the devices and only the devices
* in the list are found.
* #ifdef CFG_SYS_POST_I2C_IGNORES
* Ignore devices listed in CFG_SYS_POST_I2C_IGNORES. These devices
* are optional or not vital to board functionality.
* #endif
* #else [ ! CFG_SYS_POST_I2C_ADDRS ]
* The test is considered as passed if any I2C device is found.
* #endif
*/
#include <common.h>
#include <log.h>
#include <post.h>
#include <i2c.h>
#if CFG_POST & CFG_SYS_POST_I2C
static int i2c_ignore_device(unsigned int chip)
{
#ifdef CFG_SYS_POST_I2C_IGNORES
const unsigned char i2c_ignore_list[] = CFG_SYS_POST_I2C_IGNORES;
int i;
for (i = 0; i < sizeof(i2c_ignore_list); i++)
if (i2c_ignore_list[i] == chip)
return 1;
#endif
return 0;
}
int i2c_post_test (int flags)
{
unsigned int i;
#ifndef CFG_SYS_POST_I2C_ADDRS
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++) {
if (i2c_ignore_device(i))
continue;
if (i2c_probe (i) == 0)
return 0;
}
/* No devices found */
return -1;
#else
unsigned int ret = 0;
int j;
unsigned char i2c_addr_list[] = CFG_SYS_POST_I2C_ADDRS;
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++) {
if (i2c_ignore_device(i))
continue;
if (i2c_probe(i) != 0)
continue;
for (j = 0; j < sizeof(i2c_addr_list); ++j) {
if (i == i2c_addr_list[j]) {
i2c_addr_list[j] = 0xff;
break;
}
}
if (j == sizeof(i2c_addr_list)) {
ret = -1;
post_log("I2C: addr %02x not expected\n", i);
}
}
for (i = 0; i < sizeof(i2c_addr_list); ++i) {
if (i2c_addr_list[i] == 0xff)
continue;
if (i2c_ignore_device(i2c_addr_list[i]))
continue;
post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
ret = -1;
}
return ret;
#endif
}
#endif /* CFG_POST & CFG_SYS_POST_I2C */
|