3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * For verifying the I2C bus, a full I2C bus scanning is performed.
29 * #ifdef CONFIG_SYS_POST_I2C_ADDRS
30 * The test is considered as passed if all the devices and only the devices
31 * in the list are found.
32 * #ifdef CONFIG_SYS_POST_I2C_IGNORES
33 * Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices
34 * are optional or not vital to board functionality.
36 * #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
37 * The test is considered as passed if any I2C device is found.
45 #if CONFIG_POST & CONFIG_SYS_POST_I2C
47 static int i2c_ignore_device(unsigned int chip)
49 #ifdef CONFIG_SYS_POST_I2C_IGNORES
50 const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
53 for (i = 0; i < sizeof(i2c_ignore_list); i++)
54 if (i2c_ignore_list[i] == chip)
61 int i2c_post_test (int flags)
64 #ifndef CONFIG_SYS_POST_I2C_ADDRS
65 /* Start at address 1, address 0 is the general call address */
66 for (i = 1; i < 128; i++) {
67 if (i2c_ignore_device(i))
69 if (i2c_probe (i) == 0)
73 /* No devices found */
78 unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
80 /* Start at address 1, address 0 is the general call address */
81 for (i = 1; i < 128; i++) {
82 if (i2c_ignore_device(i))
84 if (i2c_probe(i) != 0)
87 for (j = 0; j < sizeof(i2c_addr_list); ++j) {
88 if (i == i2c_addr_list[j]) {
89 i2c_addr_list[j] = 0xff;
94 if (j == sizeof(i2c_addr_list)) {
96 post_log("I2C: addr %02x not expected\n", i);
100 for (i = 0; i < sizeof(i2c_addr_list); ++i) {
101 if (i2c_addr_list[i] == 0xff)
103 post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
111 #endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */