blob: b152deaf6abf52c91d164b49b0349b1b7795b004 [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
Wolfgang Denkad5bb452007-03-06 18:08:43 +010026/*
27 * I2C test
28 *
29 * For verifying the I2C bus, a full I2C bus scanning is performed.
30 *
31 * #ifdef I2C_ADDR_LIST
32 * The test is considered as passed if all the devices and
33 * only the devices in the list are found.
34 * #else [ ! I2C_ADDR_LIST ]
35 * The test is considered as passed if any I2C device is found.
36 * #endif
37 */
38
39#include <post.h>
40#include <i2c.h>
41
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020042#if CONFIG_POST & CONFIG_SYS_POST_I2C
Wolfgang Denkad5bb452007-03-06 18:08:43 +010043
44int i2c_post_test (int flags)
45{
46 unsigned int i;
47 unsigned int good = 0;
48#ifdef I2C_ADDR_LIST
49 unsigned int bad = 0;
50 int j;
51 unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
52 unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
53#endif
54
55 for (i = 0; i < 128; i++) {
56 if (i2c_probe (i) == 0) {
57#ifndef I2C_ADDR_LIST
58 good++;
59#else /* I2C_ADDR_LIST */
60 for (j=0; j<sizeof(i2c_addr_list); ++j) {
61 if (i == i2c_addr_list[j]) {
62 good++;
63 i2c_miss_list[j] = 0xFF;
64 break;
65 }
66 }
67 if (j == sizeof(i2c_addr_list)) {
68 bad++;
69 post_log ("I2C: addr %02X not expected\n",
70 i);
71 }
72#endif /* I2C_ADDR_LIST */
73 }
74 }
75
76#ifndef I2C_ADDR_LIST
77 return good > 0 ? 0 : -1;
78#else /* I2C_ADDR_LIST */
79 if (good != sizeof(i2c_addr_list)) {
80 for (j=0; j<sizeof(i2c_miss_list); ++j) {
81 if (i2c_miss_list[j] != 0xFF) {
82 post_log ("I2C: addr %02X did not respond\n",
83 i2c_miss_list[j]);
84 }
85 }
86 }
87 return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1;
88#endif
89}
90
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020091#endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */