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https://github.com/AsahiLinux/u-boot
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92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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/*
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* I2C test
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*
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* For verifying the I2C bus, a full I2C bus scanning is performed.
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*
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* #ifdef I2C_ADDR_LIST
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* The test is considered as passed if all the devices and
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* only the devices in the list are found.
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* #else [ ! I2C_ADDR_LIST ]
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* The test is considered as passed if any I2C device is found.
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* #endif
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*/
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#include <post.h>
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#include <i2c.h>
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#if CONFIG_POST & CFG_POST_I2C
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int i2c_post_test (int flags)
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{
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unsigned int i;
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unsigned int good = 0;
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#ifdef I2C_ADDR_LIST
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unsigned int bad = 0;
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int j;
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unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
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unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
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#endif
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for (i = 0; i < 128; i++) {
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if (i2c_probe (i) == 0) {
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#ifndef I2C_ADDR_LIST
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good++;
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#else /* I2C_ADDR_LIST */
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for (j=0; j<sizeof(i2c_addr_list); ++j) {
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if (i == i2c_addr_list[j]) {
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good++;
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i2c_miss_list[j] = 0xFF;
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break;
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}
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}
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if (j == sizeof(i2c_addr_list)) {
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bad++;
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post_log ("I2C: addr %02X not expected\n",
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i);
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}
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#endif /* I2C_ADDR_LIST */
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}
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}
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#ifndef I2C_ADDR_LIST
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return good > 0 ? 0 : -1;
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#else /* I2C_ADDR_LIST */
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if (good != sizeof(i2c_addr_list)) {
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for (j=0; j<sizeof(i2c_miss_list); ++j) {
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if (i2c_miss_list[j] != 0xFF) {
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post_log ("I2C: addr %02X did not respond\n",
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i2c_miss_list[j]);
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}
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}
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}
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return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1;
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#endif
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}
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#endif /* CONFIG_POST & CFG_POST_I2C */
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