]>
git.ipfire.org Git - people/ms/u-boot.git/blob - post/drivers/i2c.c
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,
29 * For verifying the I2C bus, a full I2C bus scanning is performed.
31 * #ifdef I2C_ADDR_LIST
32 * The test is considered as passed if all the devices and
33 * only the devices in the list are found.
34 * #else [ ! I2C_ADDR_LIST ]
35 * The test is considered as passed if any I2C device is found.
42 #if CONFIG_POST & CFG_POST_I2C
44 int i2c_post_test (int flags
)
47 unsigned int good
= 0;
51 unsigned char i2c_addr_list
[] = I2C_ADDR_LIST
;
52 unsigned char i2c_miss_list
[] = I2C_ADDR_LIST
;
55 for (i
= 0; i
< 128; i
++) {
56 if (i2c_probe (i
) == 0) {
59 #else /* I2C_ADDR_LIST */
60 for (j
=0; j
<sizeof(i2c_addr_list
); ++j
) {
61 if (i
== i2c_addr_list
[j
]) {
63 i2c_miss_list
[j
] = 0xFF;
67 if (j
== sizeof(i2c_addr_list
)) {
69 post_log ("I2C: addr %02X not expected\n",
72 #endif /* I2C_ADDR_LIST */
77 return good
> 0 ? 0 : -1;
78 #else /* I2C_ADDR_LIST */
79 if (good
!= sizeof(i2c_addr_list
)) {
80 for (j
=0; j
<sizeof(i2c_miss_list
); ++j
) {
81 if (i2c_miss_list
[j
] != 0xFF) {
82 post_log ("I2C: addr %02X did not respond\n",
87 return ((good
== sizeof(i2c_addr_list
)) && (bad
== 0)) ? 0 : -1;
91 #endif /* CONFIG_POST & CFG_POST_I2C */