/* * (C) Copyright 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> /* * I2C test * * For verifying the I2C bus, a full I2C bus scanning is performed. * * #ifdef I2C_ADDR_LIST * The test is considered as passed if all the devices and * only the devices in the list are found. * #else [ ! I2C_ADDR_LIST ] * The test is considered as passed if any I2C device is found. * #endif */ #include <post.h> #include <i2c.h> #if CONFIG_POST & CONFIG_SYS_POST_I2C int i2c_post_test (int flags) { unsigned int i; unsigned int good = 0; #ifdef I2C_ADDR_LIST unsigned int bad = 0; int j; unsigned char i2c_addr_list[] = I2C_ADDR_LIST; unsigned char i2c_miss_list[] = I2C_ADDR_LIST; #endif for (i = 0; i < 128; i++) { if (i2c_probe (i) == 0) { #ifndef I2C_ADDR_LIST good++; #else /* I2C_ADDR_LIST */ for (j=0; j<sizeof(i2c_addr_list); ++j) { if (i == i2c_addr_list[j]) { good++; i2c_miss_list[j] = 0xFF; break; } } if (j == sizeof(i2c_addr_list)) { bad++; post_log ("I2C: addr %02X not expected\n", i); } #endif /* I2C_ADDR_LIST */ } } #ifndef I2C_ADDR_LIST return good > 0 ? 0 : -1; #else /* I2C_ADDR_LIST */ if (good != sizeof(i2c_addr_list)) { for (j=0; j<sizeof(i2c_miss_list); ++j) { if (i2c_miss_list[j] != 0xFF) { post_log ("I2C: addr %02X did not respond\n", i2c_miss_list[j]); } } } return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1; #endif } #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */