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authorwdenk <wdenk>2002-12-17 01:51:00 +0000
committerwdenk <wdenk>2002-12-17 01:51:00 +0000
commit6aff3115b90780933d390d2b471479179927468d (patch)
treeea9e54617d8a6f6b2d05d37c7f2bde24ce6dfb35 /post/i2c.c
parent228f29ac6e0026e596b3a6fbb640118b9944cdd8 (diff)
* Use 1-byte-read instead of -write for iprobe() function
Add i2c commands to PM826 config * extend I2C POST code: check for list on known addresses
Diffstat (limited to 'post/i2c.c')
-rw-r--r--post/i2c.c51
1 files changed, 45 insertions, 6 deletions
diff --git a/post/i2c.c b/post/i2c.c
index 2e38986662..1b2e64471b 100644
--- a/post/i2c.c
+++ b/post/i2c.c
@@ -29,8 +29,13 @@
* I2C test
*
* For verifying the I2C bus, a full I2C bus scanning is performed.
- * If any I2C device is found, the test is considered as passed,
- * otherwise failed.
+ *
+ * #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>
@@ -41,14 +46,48 @@
int i2c_post_test (int flags)
{
unsigned int i;
- unsigned int chips = 0;
+ 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)
- chips++;
+ 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 */
+ }
}
- return chips > 0 ? 0 : -1;
+#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 */