diff options
author | Wolfgang Denk <wd@pollux.denx.de> | 2007-03-06 18:08:43 +0100 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2007-03-06 18:08:43 +0100 |
commit | ad5bb451ade552c44bef9119d907929ebc2c126f (patch) | |
tree | df979d3c6385a161cd6df6b6f903ed7eaad31948 /post/drivers/i2c.c | |
parent | a5284efd125967675b2e9c6ef7b95832268ad360 (diff) | |
download | bootable_bootloader_goldelico_gta04-ad5bb451ade552c44bef9119d907929ebc2c126f.zip bootable_bootloader_goldelico_gta04-ad5bb451ade552c44bef9119d907929ebc2c126f.tar.gz bootable_bootloader_goldelico_gta04-ad5bb451ade552c44bef9119d907929ebc2c126f.tar.bz2 |
Restructure POST directory to support of other CPUs, boards, etc.
Diffstat (limited to 'post/drivers/i2c.c')
-rw-r--r-- | post/drivers/i2c.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/post/drivers/i2c.c b/post/drivers/i2c.c new file mode 100644 index 0000000..1b2e644 --- /dev/null +++ b/post/drivers/i2c.c @@ -0,0 +1,94 @@ +/* + * (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 + */ + +#include <common.h> + +#ifdef CONFIG_POST + +/* + * 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 <post.h> +#include <i2c.h> + +#if CONFIG_POST & CFG_POST_I2C + +int i2c_post_test (int flags) +{ + unsigned int i; + unsigned int good = 0; +#ifdef I2C_ADDR_LIST + unsigned int bad = 0; + int j; + unsigned char i2c_addr_list[] = I2C_ADDR_LIST; + unsigned char i2c_miss_list[] = I2C_ADDR_LIST; +#endif + + for (i = 0; i < 128; i++) { + if (i2c_probe (i) == 0) { +#ifndef I2C_ADDR_LIST + good++; +#else /* I2C_ADDR_LIST */ + 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); + } +#endif /* I2C_ADDR_LIST */ + } + } + +#ifndef I2C_ADDR_LIST + return good > 0 ? 0 : -1; +#else /* I2C_ADDR_LIST */ + 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 & CFG_POST_I2C */ +#endif /* CONFIG_POST */ |