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ad5bb451 WD |
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 | ||
ad5bb451 WD |
24 | /* |
25 | * I2C test | |
26 | * | |
27 | * For verifying the I2C bus, a full I2C bus scanning is performed. | |
28 | * | |
60aaaa07 | 29 | * #ifdef CONFIG_SYS_POST_I2C_ADDRS |
9d921f19 PT |
30 | * The test is considered as passed if all the devices and only the devices |
31 | * in the list are found. | |
32 | * #ifdef CONFIG_SYS_POST_I2C_IGNORES | |
33 | * Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices | |
34 | * are optional or not vital to board functionality. | |
35 | * #endif | |
60aaaa07 | 36 | * #else [ ! CONFIG_SYS_POST_I2C_ADDRS ] |
ad5bb451 WD |
37 | * The test is considered as passed if any I2C device is found. |
38 | * #endif | |
39 | */ | |
40 | ||
b9b1bc85 | 41 | #include <common.h> |
ad5bb451 WD |
42 | #include <post.h> |
43 | #include <i2c.h> | |
44 | ||
6d0f6bcf | 45 | #if CONFIG_POST & CONFIG_SYS_POST_I2C |
ad5bb451 | 46 | |
9d921f19 PT |
47 | static int i2c_ignore_device(unsigned int chip) |
48 | { | |
49 | #ifdef CONFIG_SYS_POST_I2C_IGNORES | |
50 | const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES; | |
51 | int i; | |
52 | ||
53 | for (i = 0; i < sizeof(i2c_ignore_list); i++) | |
54 | if (i2c_ignore_list[i] == chip) | |
55 | return 1; | |
56 | #endif | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
ad5bb451 WD |
61 | int i2c_post_test (int flags) |
62 | { | |
63 | unsigned int i; | |
60aaaa07 | 64 | #ifndef CONFIG_SYS_POST_I2C_ADDRS |
9f949c9a | 65 | /* Start at address 1, address 0 is the general call address */ |
9b107e61 | 66 | for (i = 1; i < 128; i++) { |
9d921f19 PT |
67 | if (i2c_ignore_device(i)) |
68 | continue; | |
b9b1bc85 PT |
69 | if (i2c_probe (i) == 0) |
70 | return 0; | |
9b107e61 | 71 | } |
b9b1bc85 PT |
72 | |
73 | /* No devices found */ | |
74 | return -1; | |
75 | #else | |
7e263cea | 76 | unsigned int ret = 0; |
ad5bb451 | 77 | int j; |
8343f8a7 | 78 | unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS; |
ad5bb451 | 79 | |
9f949c9a PT |
80 | /* Start at address 1, address 0 is the general call address */ |
81 | for (i = 1; i < 128; i++) { | |
9d921f19 PT |
82 | if (i2c_ignore_device(i)) |
83 | continue; | |
b9b1bc85 PT |
84 | if (i2c_probe(i) != 0) |
85 | continue; | |
7e263cea | 86 | |
b9b1bc85 PT |
87 | for (j = 0; j < sizeof(i2c_addr_list); ++j) { |
88 | if (i == i2c_addr_list[j]) { | |
7e263cea | 89 | i2c_addr_list[j] = 0xff; |
b9b1bc85 | 90 | break; |
ad5bb451 | 91 | } |
b9b1bc85 PT |
92 | } |
93 | ||
94 | if (j == sizeof(i2c_addr_list)) { | |
7e263cea PT |
95 | ret = -1; |
96 | post_log("I2C: addr %02x not expected\n", i); | |
ad5bb451 WD |
97 | } |
98 | } | |
99 | ||
7e263cea PT |
100 | for (i = 0; i < sizeof(i2c_addr_list); ++i) { |
101 | if (i2c_addr_list[i] == 0xff) | |
102 | continue; | |
103 | post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]); | |
104 | ret = -1; | |
ad5bb451 | 105 | } |
7e263cea PT |
106 | |
107 | return ret; | |
ad5bb451 WD |
108 | #endif |
109 | } | |
110 | ||
6d0f6bcf | 111 | #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */ |