blob: 1b2e64471b30145607aed0594b8f5c1fd30f7e7e [file] [log] [blame]
Wolfgang Denkad5bb452007-03-06 18:08:43 +01001/*
2 * (C) Copyright 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25
26#ifdef CONFIG_POST
27
28/*
29 * I2C test
30 *
31 * For verifying the I2C bus, a full I2C bus scanning is performed.
32 *
33 * #ifdef I2C_ADDR_LIST
34 * The test is considered as passed if all the devices and
35 * only the devices in the list are found.
36 * #else [ ! I2C_ADDR_LIST ]
37 * The test is considered as passed if any I2C device is found.
38 * #endif
39 */
40
41#include <post.h>
42#include <i2c.h>
43
44#if CONFIG_POST & CFG_POST_I2C
45
46int i2c_post_test (int flags)
47{
48 unsigned int i;
49 unsigned int good = 0;
50#ifdef I2C_ADDR_LIST
51 unsigned int bad = 0;
52 int j;
53 unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
54 unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
55#endif
56
57 for (i = 0; i < 128; i++) {
58 if (i2c_probe (i) == 0) {
59#ifndef I2C_ADDR_LIST
60 good++;
61#else /* I2C_ADDR_LIST */
62 for (j=0; j<sizeof(i2c_addr_list); ++j) {
63 if (i == i2c_addr_list[j]) {
64 good++;
65 i2c_miss_list[j] = 0xFF;
66 break;
67 }
68 }
69 if (j == sizeof(i2c_addr_list)) {
70 bad++;
71 post_log ("I2C: addr %02X not expected\n",
72 i);
73 }
74#endif /* I2C_ADDR_LIST */
75 }
76 }
77
78#ifndef I2C_ADDR_LIST
79 return good > 0 ? 0 : -1;
80#else /* I2C_ADDR_LIST */
81 if (good != sizeof(i2c_addr_list)) {
82 for (j=0; j<sizeof(i2c_miss_list); ++j) {
83 if (i2c_miss_list[j] != 0xFF) {
84 post_log ("I2C: addr %02X did not respond\n",
85 i2c_miss_list[j]);
86 }
87 }
88 }
89 return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1;
90#endif
91}
92
93#endif /* CONFIG_POST & CFG_POST_I2C */
94#endif /* CONFIG_POST */