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 | ||
| 24 | #include <common.h> | |
| 25 | ||
| ad5bb451 WD |
26 | /* |
| 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 | ||
| 6d0f6bcf | 42 | #if CONFIG_POST & CONFIG_SYS_POST_I2C |
| ad5bb451 WD |
43 | |
| 44 | int 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 | ||
| 6d0f6bcf | 91 | #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */ |