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1 | /* | |
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 | ||
46 | int 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 */ |