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/*
* (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
*/
/*
* 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 <common.h>
#include <post.h>
#include <i2c.h>
#if CONFIG_POST & CONFIG_SYS_POST_I2C
int i2c_post_test (int flags)
{
unsigned int i;
#ifndef I2C_ADDR_LIST
for (i = 0; i < 128; i++)
if (i2c_probe (i) == 0)
return 0;
/* No devices found */
return -1;
#else
unsigned int good = 0;
unsigned int bad = 0;
int j;
unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
for (i = 0; i < 128; i++) {
if (i2c_probe(i) != 0)
continue;
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);
}
}
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 */
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