| Wolfgang Denk | b38e0df | 2007-03-06 18:08:43 +0100 | [diff] [blame] | 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 */ |