diff options
Diffstat (limited to 'post/board/lwmon5/watchdog.c')
| -rw-r--r-- | post/board/lwmon5/watchdog.c | 47 |
1 files changed, 19 insertions, 28 deletions
diff --git a/post/board/lwmon5/watchdog.c b/post/board/lwmon5/watchdog.c index 899fbfb..16c01be 100644 --- a/post/board/lwmon5/watchdog.c +++ b/post/board/lwmon5/watchdog.c @@ -24,14 +24,11 @@ #include <common.h> -/* - * This test verifies if the reason of last reset was an abnormal voltage +/* This test verifies if the reason of last reset was an abnormal voltage * condition, than it performs watchdog test, measuing time required to * trigger watchdog reset. */ -#ifdef CONFIG_POST - #include <post.h> #if CONFIG_POST & CFG_POST_WATCHDOG @@ -55,9 +52,8 @@ static void watchdog_magic_write(uint value) int sysmon1_post_test(int flags) { - if (gpio_read_in_bit(CFG_GPIO_SYSMON_STATUS) == 0) { - /* - * 3.1. GPIO62 is low + if (gpio_read_in_bit(CFG_GPIO_SYSMON_STATUS)) { + /* 3.1. GPIO62 is low * Assuming system voltage failure. */ post_log("Abnormal voltage detected (GPIO62)\n"); @@ -69,14 +65,11 @@ int sysmon1_post_test(int flags) int lwmon5_watchdog_post_test(int flags) { - ulong time; - /* On each reset scratch register 1 should be tested, * but first test GPIO62: */ if (!(flags & POST_MANUAL) && sysmon1_post_test(flags)) { - /* - * 3.1. GPIO62 is low + /* 3.1. GPIO62 is low * Assuming system voltage failure. */ /* 3.1.1. Set scratch register 1 to 0x0000xxxx */ @@ -86,12 +79,12 @@ int lwmon5_watchdog_post_test(int flags) } if (watchdog_magic_read() != CFG_WATCHDOG_MAGIC) { - /* - * 3.2. Scratch register 1 differs from magic value 0x1248xxxx + /* 3.2. Scratch register 1 differs from magic value 0x1248xxxx * Assuming PowerOn */ int ints; ulong base; + ulong time; /* 3.2.1. Set magic value to scratch register */ watchdog_magic_write(CFG_WATCHDOG_MAGIC); @@ -109,28 +102,26 @@ int lwmon5_watchdog_post_test(int flags) if (ints) enable_interrupts (); - /* - * 3.2.5. Reset didn't happen. - Set 0x0000xxxx + /* 3.2.5. Reset didn't happen. - Set 0x0000xxxx * into scratch register 1 */ watchdog_magic_write(0); /* 3.2.6. Mark test as failed. */ post_log("hw watchdog time : %u ms, failed ", time); return 2; + } else { + /* 3.3. Scratch register matches magic value 0x1248xxxx + * Assume this is watchdog-initiated reset + */ + ulong time; + /* 3.3.1. So, the test succeed, save measured time to syslog. */ + time = in_be32((void *)CFG_WATCHDOG_TIME_ADDR); + post_log("hw watchdog time : %u ms, passed ", time); + /* 3.3.2. Set scratch register 1 to 0x0000xxxx */ + watchdog_magic_write(0); + return 0; } - - /* - * 3.3. Scratch register matches magic value 0x1248xxxx - * Assume this is watchdog-initiated reset - */ - /* 3.3.1. So, the test succeed, save measured time to syslog. */ - time = in_be32((void *)CFG_WATCHDOG_TIME_ADDR); - post_log("hw watchdog time : %u ms, passed ", time); - /* 3.3.2. Set scratch register 1 to 0x0000xxxx */ - watchdog_magic_write(0); - - return 0; + return -1; } #endif /* CONFIG_POST & CFG_POST_WATCHDOG */ -#endif /* CONFIG_POST */ |