projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | * | |
| 29 | * #ifdef I2C_ADDR_LIST | |
| 30 | * The test is considered as passed if all the devices and | |
| 31 | * only the devices in the list are found. | |
| 32 | * #else [ ! I2C_ADDR_LIST ] | |
| 33 | * The test is considered as passed if any I2C device is found. | |
| 34 | * #endif | |
| 35 | */ | |
| 36 | ||
| b9b1bc85 | 37 | #include <common.h> |
| ad5bb451 WD |
38 | #include <post.h> |
| 39 | #include <i2c.h> | |
| 40 | ||
| 6d0f6bcf | 41 | #if CONFIG_POST & CONFIG_SYS_POST_I2C |
| ad5bb451 WD |
42 | |
| 43 | int i2c_post_test (int flags) | |
| 44 | { | |
| 45 | unsigned int i; | |
| b9b1bc85 | 46 | #ifndef I2C_ADDR_LIST |
| 9f949c9a PT |
47 | /* Start at address 1, address 0 is the general call address */ |
| 48 | for (i = 1; i < 128; i++) | |
| b9b1bc85 PT |
49 | if (i2c_probe (i) == 0) |
| 50 | return 0; | |
| 51 | ||
| 52 | /* No devices found */ | |
| 53 | return -1; | |
| 54 | #else | |
| 7e263cea | 55 | unsigned int ret = 0; |
| ad5bb451 | 56 | int j; |
| 7e263cea | 57 | const unsigned char i2c_addr_list[] = I2C_ADDR_LIST; |
| ad5bb451 | 58 | |
| 9f949c9a PT |
59 | /* Start at address 1, address 0 is the general call address */ |
| 60 | for (i = 1; i < 128; i++) { | |
| b9b1bc85 PT |
61 | if (i2c_probe(i) != 0) |
| 62 | continue; | |
| 7e263cea | 63 | |
| b9b1bc85 PT |
64 | for (j = 0; j < sizeof(i2c_addr_list); ++j) { |
| 65 | if (i == i2c_addr_list[j]) { | |
| 7e263cea | 66 | i2c_addr_list[j] = 0xff; |
| b9b1bc85 | 67 | break; |
| ad5bb451 | 68 | } |
| b9b1bc85 PT |
69 | } |
| 70 | ||
| 71 | if (j == sizeof(i2c_addr_list)) { | |
| 7e263cea PT |
72 | ret = -1; |
| 73 | post_log("I2C: addr %02x not expected\n", i); | |
| ad5bb451 WD |
74 | } |
| 75 | } | |
| 76 | ||
| 7e263cea PT |
77 | for (i = 0; i < sizeof(i2c_addr_list); ++i) { |
| 78 | if (i2c_addr_list[i] == 0xff) | |
| 79 | continue; | |
| 80 | post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]); | |
| 81 | ret = -1; | |
| ad5bb451 | 82 | } |
| 7e263cea PT |
83 | |
| 84 | return ret; | |
| ad5bb451 WD |
85 | #endif |
| 86 | } | |
| 87 | ||
| 6d0f6bcf | 88 | #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */ |