1ad5bb451SWolfgang Denk /* 2ad5bb451SWolfgang Denk * (C) Copyright 2002 3ad5bb451SWolfgang Denk * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4ad5bb451SWolfgang Denk * 5ad5bb451SWolfgang Denk * See file CREDITS for list of people who contributed to this 6ad5bb451SWolfgang Denk * project. 7ad5bb451SWolfgang Denk * 8ad5bb451SWolfgang Denk * This program is free software; you can redistribute it and/or 9ad5bb451SWolfgang Denk * modify it under the terms of the GNU General Public License as 10ad5bb451SWolfgang Denk * published by the Free Software Foundation; either version 2 of 11ad5bb451SWolfgang Denk * the License, or (at your option) any later version. 12ad5bb451SWolfgang Denk * 13ad5bb451SWolfgang Denk * This program is distributed in the hope that it will be useful, 14ad5bb451SWolfgang Denk * but WITHOUT ANY WARRANTY; without even the implied warranty of 15ad5bb451SWolfgang Denk * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16ad5bb451SWolfgang Denk * GNU General Public License for more details. 17ad5bb451SWolfgang Denk * 18ad5bb451SWolfgang Denk * You should have received a copy of the GNU General Public License 19ad5bb451SWolfgang Denk * along with this program; if not, write to the Free Software 20ad5bb451SWolfgang Denk * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21ad5bb451SWolfgang Denk * MA 02111-1307 USA 22ad5bb451SWolfgang Denk */ 23ad5bb451SWolfgang Denk 24ad5bb451SWolfgang Denk /* 25ad5bb451SWolfgang Denk * I2C test 26ad5bb451SWolfgang Denk * 27ad5bb451SWolfgang Denk * For verifying the I2C bus, a full I2C bus scanning is performed. 28ad5bb451SWolfgang Denk * 29ad5bb451SWolfgang Denk * #ifdef I2C_ADDR_LIST 30ad5bb451SWolfgang Denk * The test is considered as passed if all the devices and 31ad5bb451SWolfgang Denk * only the devices in the list are found. 32ad5bb451SWolfgang Denk * #else [ ! I2C_ADDR_LIST ] 33ad5bb451SWolfgang Denk * The test is considered as passed if any I2C device is found. 34ad5bb451SWolfgang Denk * #endif 35ad5bb451SWolfgang Denk */ 36ad5bb451SWolfgang Denk 37*b9b1bc85SPeter Tyser #include <common.h> 38ad5bb451SWolfgang Denk #include <post.h> 39ad5bb451SWolfgang Denk #include <i2c.h> 40ad5bb451SWolfgang Denk 416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #if CONFIG_POST & CONFIG_SYS_POST_I2C 42ad5bb451SWolfgang Denk 43ad5bb451SWolfgang Denk int i2c_post_test (int flags) 44ad5bb451SWolfgang Denk { 45ad5bb451SWolfgang Denk unsigned int i; 46*b9b1bc85SPeter Tyser #ifndef I2C_ADDR_LIST 47*b9b1bc85SPeter Tyser for (i = 0; i < 128; i++) 48*b9b1bc85SPeter Tyser if (i2c_probe (i) == 0) 49*b9b1bc85SPeter Tyser return 0; 50*b9b1bc85SPeter Tyser 51*b9b1bc85SPeter Tyser /* No devices found */ 52*b9b1bc85SPeter Tyser return -1; 53*b9b1bc85SPeter Tyser #else 54ad5bb451SWolfgang Denk unsigned int good = 0; 55ad5bb451SWolfgang Denk unsigned int bad = 0; 56ad5bb451SWolfgang Denk int j; 57ad5bb451SWolfgang Denk unsigned char i2c_addr_list[] = I2C_ADDR_LIST; 58ad5bb451SWolfgang Denk unsigned char i2c_miss_list[] = I2C_ADDR_LIST; 59ad5bb451SWolfgang Denk 60ad5bb451SWolfgang Denk for (i = 0; i < 128; i++) { 61*b9b1bc85SPeter Tyser if (i2c_probe(i) != 0) 62*b9b1bc85SPeter Tyser continue; 63ad5bb451SWolfgang Denk for (j = 0; j < sizeof(i2c_addr_list); ++j) { 64ad5bb451SWolfgang Denk if (i == i2c_addr_list[j]) { 65ad5bb451SWolfgang Denk good++; 66ad5bb451SWolfgang Denk i2c_miss_list[j] = 0xFF; 67ad5bb451SWolfgang Denk break; 68ad5bb451SWolfgang Denk } 69ad5bb451SWolfgang Denk } 70*b9b1bc85SPeter Tyser 71ad5bb451SWolfgang Denk if (j == sizeof(i2c_addr_list)) { 72ad5bb451SWolfgang Denk bad++; 73*b9b1bc85SPeter Tyser post_log("I2C: addr %02X not expected\n", i); 74ad5bb451SWolfgang Denk } 75ad5bb451SWolfgang Denk } 76ad5bb451SWolfgang Denk 77ad5bb451SWolfgang Denk if (good != sizeof(i2c_addr_list)) { 78ad5bb451SWolfgang Denk for (j = 0; j < sizeof(i2c_miss_list); ++j) { 79ad5bb451SWolfgang Denk if (i2c_miss_list[j] != 0xFF) { 80ad5bb451SWolfgang Denk post_log("I2C: addr %02X did not respond\n", 81ad5bb451SWolfgang Denk i2c_miss_list[j]); 82ad5bb451SWolfgang Denk } 83ad5bb451SWolfgang Denk } 84ad5bb451SWolfgang Denk } 85ad5bb451SWolfgang Denk return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1; 86ad5bb451SWolfgang Denk #endif 87ad5bb451SWolfgang Denk } 88ad5bb451SWolfgang Denk 896d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */ 90