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 */ 95