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https://github.com/brain-hackers/u-boot-brain
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c55285015a
Devices in CONFIG_SYS_POST_I2C_IGNORES list may be absent and the rule is not to report I2C POST failure for devices in this list. Currently this doesn't work since probing for these devices isn't done and thus they are not marked as successfully probed. Ignore optional devices when checking for devices that didn't respond. Signed-off-by: Anatolij Gustschin <agust@denx.de>
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*
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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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/*
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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 CONFIG_SYS_POST_I2C_ADDRS
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* The test is considered as passed if all the devices and only the devices
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* in the list are found.
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* #ifdef CONFIG_SYS_POST_I2C_IGNORES
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* Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices
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* are optional or not vital to board functionality.
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* #endif
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* #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
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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 <common.h>
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#include <post.h>
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#include <i2c.h>
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#if CONFIG_POST & CONFIG_SYS_POST_I2C
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static int i2c_ignore_device(unsigned int chip)
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{
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#ifdef CONFIG_SYS_POST_I2C_IGNORES
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const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
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int i;
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for (i = 0; i < sizeof(i2c_ignore_list); i++)
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if (i2c_ignore_list[i] == chip)
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return 1;
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#endif
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return 0;
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}
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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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#ifndef CONFIG_SYS_POST_I2C_ADDRS
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/* Start at address 1, address 0 is the general call address */
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for (i = 1; i < 128; i++) {
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if (i2c_ignore_device(i))
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continue;
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if (i2c_probe (i) == 0)
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return 0;
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}
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/* No devices found */
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return -1;
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#else
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unsigned int ret = 0;
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int j;
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unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
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/* Start at address 1, address 0 is the general call address */
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for (i = 1; i < 128; i++) {
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if (i2c_ignore_device(i))
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continue;
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if (i2c_probe(i) != 0)
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continue;
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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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i2c_addr_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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ret = -1;
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post_log("I2C: addr %02x not expected\n", i);
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}
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}
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for (i = 0; i < sizeof(i2c_addr_list); ++i) {
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if (i2c_addr_list[i] == 0xff)
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continue;
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if (i2c_ignore_device(i2c_addr_list[i]))
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continue;
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post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
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ret = -1;
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}
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return ret;
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#endif
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}
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#endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */
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