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Diffstat (limited to 'post/drivers/i2c.c')
-rw-r--r--post/drivers/i2c.c99
1 files changed, 59 insertions, 40 deletions
diff --git a/post/drivers/i2c.c b/post/drivers/i2c.c
index b152dea..3080e81 100644
--- a/post/drivers/i2c.c
+++ b/post/drivers/i2c.c
@@ -21,70 +21,89 @@
* MA 02111-1307 USA
*/
-#include <common.h>
-
/*
* 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 ]
+ * #ifdef CONFIG_SYS_POST_I2C_ADDRS
+ * The test is considered as passed if all the devices and only the devices
+ * in the list are found.
+ * #ifdef CONFIG_SYS_POST_I2C_IGNORES
+ * Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices
+ * are optional or not vital to board functionality.
+ * #endif
+ * #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
* The test is considered as passed if any I2C device is found.
* #endif
*/
+#include <common.h>
#include <post.h>
#include <i2c.h>
#if CONFIG_POST & CONFIG_SYS_POST_I2C
+static int i2c_ignore_device(unsigned int chip)
+{
+#ifdef CONFIG_SYS_POST_I2C_IGNORES
+ const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
+ int i;
+
+ for (i = 0; i < sizeof(i2c_ignore_list); i++)
+ if (i2c_ignore_list[i] == chip)
+ return 1;
+#endif
+
+ return 0;
+}
+
int i2c_post_test (int flags)
{
unsigned int i;
- unsigned int good = 0;
-#ifdef I2C_ADDR_LIST
- unsigned int bad = 0;
+#ifndef CONFIG_SYS_POST_I2C_ADDRS
+ /* Start at address 1, address 0 is the general call address */
+ for (i = 1; i < 128; i++)
+ if (i2c_ignore_device(i))
+ continue;
+ if (i2c_probe (i) == 0)
+ return 0;
+
+ /* No devices found */
+ return -1;
+#else
+ unsigned int ret = 0;
int j;
- unsigned char i2c_addr_list[] = I2C_ADDR_LIST;
- unsigned char i2c_miss_list[] = I2C_ADDR_LIST;
-#endif
+ const unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
- 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);
+ /* Start at address 1, address 0 is the general call address */
+ for (i = 1; i < 128; i++) {
+ if (i2c_ignore_device(i))
+ continue;
+ if (i2c_probe(i) != 0)
+ continue;
+
+ for (j = 0; j < sizeof(i2c_addr_list); ++j) {
+ if (i == i2c_addr_list[j]) {
+ i2c_addr_list[j] = 0xff;
+ break;
}
-#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]);
- }
+ if (j == sizeof(i2c_addr_list)) {
+ ret = -1;
+ post_log("I2C: addr %02x not expected\n", i);
}
}
- return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1;
+
+ for (i = 0; i < sizeof(i2c_addr_list); ++i) {
+ if (i2c_addr_list[i] == 0xff)
+ continue;
+ post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
+ ret = -1;
+ }
+
+ return ret;
#endif
}