1*ad5bb451SWolfgang Denk /* 2*ad5bb451SWolfgang Denk * (C) Copyright 2002 3*ad5bb451SWolfgang Denk * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4*ad5bb451SWolfgang Denk * 5*ad5bb451SWolfgang Denk * See file CREDITS for list of people who contributed to this 6*ad5bb451SWolfgang Denk * project. 7*ad5bb451SWolfgang Denk * 8*ad5bb451SWolfgang Denk * This program is free software; you can redistribute it and/or 9*ad5bb451SWolfgang Denk * modify it under the terms of the GNU General Public License as 10*ad5bb451SWolfgang Denk * published by the Free Software Foundation; either version 2 of 11*ad5bb451SWolfgang Denk * the License, or (at your option) any later version. 12*ad5bb451SWolfgang Denk * 13*ad5bb451SWolfgang Denk * This program is distributed in the hope that it will be useful, 14*ad5bb451SWolfgang Denk * but WITHOUT ANY WARRANTY; without even the implied warranty of 15*ad5bb451SWolfgang Denk * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16*ad5bb451SWolfgang Denk * GNU General Public License for more details. 17*ad5bb451SWolfgang Denk * 18*ad5bb451SWolfgang Denk * You should have received a copy of the GNU General Public License 19*ad5bb451SWolfgang Denk * along with this program; if not, write to the Free Software 20*ad5bb451SWolfgang Denk * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21*ad5bb451SWolfgang Denk * MA 02111-1307 USA 22*ad5bb451SWolfgang Denk */ 23*ad5bb451SWolfgang Denk 24*ad5bb451SWolfgang Denk #include <common.h> 25*ad5bb451SWolfgang Denk 26*ad5bb451SWolfgang Denk #ifdef CONFIG_POST 27*ad5bb451SWolfgang Denk 28*ad5bb451SWolfgang Denk /* 29*ad5bb451SWolfgang Denk * I2C test 30*ad5bb451SWolfgang Denk * 31*ad5bb451SWolfgang Denk * For verifying the I2C bus, a full I2C bus scanning is performed. 32*ad5bb451SWolfgang Denk * 33*ad5bb451SWolfgang Denk * #ifdef I2C_ADDR_LIST 34*ad5bb451SWolfgang Denk * The test is considered as passed if all the devices and 35*ad5bb451SWolfgang Denk * only the devices in the list are found. 36*ad5bb451SWolfgang Denk * #else [ ! I2C_ADDR_LIST ] 37*ad5bb451SWolfgang Denk * The test is considered as passed if any I2C device is found. 38*ad5bb451SWolfgang Denk * #endif 39*ad5bb451SWolfgang Denk */ 40*ad5bb451SWolfgang Denk 41*ad5bb451SWolfgang Denk #include <post.h> 42*ad5bb451SWolfgang Denk #include <i2c.h> 43*ad5bb451SWolfgang Denk 44*ad5bb451SWolfgang Denk #if CONFIG_POST & CFG_POST_I2C 45*ad5bb451SWolfgang Denk 46*ad5bb451SWolfgang Denk int i2c_post_test (int flags) 47*ad5bb451SWolfgang Denk { 48*ad5bb451SWolfgang Denk unsigned int i; 49*ad5bb451SWolfgang Denk unsigned int good = 0; 50*ad5bb451SWolfgang Denk #ifdef I2C_ADDR_LIST 51*ad5bb451SWolfgang Denk unsigned int bad = 0; 52*ad5bb451SWolfgang Denk int j; 53*ad5bb451SWolfgang Denk unsigned char i2c_addr_list[] = I2C_ADDR_LIST; 54*ad5bb451SWolfgang Denk unsigned char i2c_miss_list[] = I2C_ADDR_LIST; 55*ad5bb451SWolfgang Denk #endif 56*ad5bb451SWolfgang Denk 57*ad5bb451SWolfgang Denk for (i = 0; i < 128; i++) { 58*ad5bb451SWolfgang Denk if (i2c_probe (i) == 0) { 59*ad5bb451SWolfgang Denk #ifndef I2C_ADDR_LIST 60*ad5bb451SWolfgang Denk good++; 61*ad5bb451SWolfgang Denk #else /* I2C_ADDR_LIST */ 62*ad5bb451SWolfgang Denk for (j=0; j<sizeof(i2c_addr_list); ++j) { 63*ad5bb451SWolfgang Denk if (i == i2c_addr_list[j]) { 64*ad5bb451SWolfgang Denk good++; 65*ad5bb451SWolfgang Denk i2c_miss_list[j] = 0xFF; 66*ad5bb451SWolfgang Denk break; 67*ad5bb451SWolfgang Denk } 68*ad5bb451SWolfgang Denk } 69*ad5bb451SWolfgang Denk if (j == sizeof(i2c_addr_list)) { 70*ad5bb451SWolfgang Denk bad++; 71*ad5bb451SWolfgang Denk post_log ("I2C: addr %02X not expected\n", 72*ad5bb451SWolfgang Denk i); 73*ad5bb451SWolfgang Denk } 74*ad5bb451SWolfgang Denk #endif /* I2C_ADDR_LIST */ 75*ad5bb451SWolfgang Denk } 76*ad5bb451SWolfgang Denk } 77*ad5bb451SWolfgang Denk 78*ad5bb451SWolfgang Denk #ifndef I2C_ADDR_LIST 79*ad5bb451SWolfgang Denk return good > 0 ? 0 : -1; 80*ad5bb451SWolfgang Denk #else /* I2C_ADDR_LIST */ 81*ad5bb451SWolfgang Denk if (good != sizeof(i2c_addr_list)) { 82*ad5bb451SWolfgang Denk for (j=0; j<sizeof(i2c_miss_list); ++j) { 83*ad5bb451SWolfgang Denk if (i2c_miss_list[j] != 0xFF) { 84*ad5bb451SWolfgang Denk post_log ("I2C: addr %02X did not respond\n", 85*ad5bb451SWolfgang Denk i2c_miss_list[j]); 86*ad5bb451SWolfgang Denk } 87*ad5bb451SWolfgang Denk } 88*ad5bb451SWolfgang Denk } 89*ad5bb451SWolfgang Denk return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1; 90*ad5bb451SWolfgang Denk #endif 91*ad5bb451SWolfgang Denk } 92*ad5bb451SWolfgang Denk 93*ad5bb451SWolfgang Denk #endif /* CONFIG_POST & CFG_POST_I2C */ 94*ad5bb451SWolfgang Denk #endif /* CONFIG_POST */ 95