charger: dump the last_kmsg when going into charger mode
Change-Id: I3b76bb5071d8a44adfb221774bb304bf296c8c1b
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/charger/charger.c b/charger/charger.c
index 0ade250..5d04a0f 100644
--- a/charger/charger.c
+++ b/charger/charger.c
@@ -37,6 +37,7 @@
#include <cutils/android_reboot.h>
#include <cutils/klog.h>
#include <cutils/list.h>
+#include <cutils/misc.h>
#include <cutils/uevent.h>
#include "minui/minui.h"
@@ -60,6 +61,9 @@
#define BATTERY_FULL_THRESH 95
+#define LAST_KMSG_PATH "/proc/last_kmsg"
+#define LAST_KMSG_MAX_SZ (32 * 1024)
+
#define LOGE(x...) do { KLOG_ERROR("charger", x); } while (0)
#define LOGI(x...) do { KLOG_INFO("charger", x); } while (0)
#define LOGV(x...) do { KLOG_DEBUG("charger", x); } while (0)
@@ -188,6 +192,53 @@
gr_fill(0, 0, gr_fb_width(), gr_fb_height());
};
+#define MAX_KLOG_WRITE_BUF_SZ 256
+
+static void dump_last_kmsg(void)
+{
+ char *buf;
+ char *ptr;
+ unsigned sz = 0;
+ int len;
+
+ LOGI("\n");
+ LOGI("*************** LAST KMSG ***************\n");
+ LOGI("\n");
+ buf = load_file(LAST_KMSG_PATH, &sz);
+ if (!buf || !sz) {
+ LOGI("last_kmsg not found. Cold reset?\n");
+ goto out;
+ }
+
+ len = min(sz, LAST_KMSG_MAX_SZ);
+ ptr = buf + (sz - len);
+
+ while (len > 0) {
+ int cnt = min(len, MAX_KLOG_WRITE_BUF_SZ);
+ char yoink;
+ char *nl;
+
+ nl = memrchr(ptr, '\n', cnt - 1);
+ if (nl)
+ cnt = nl - ptr + 1;
+
+ yoink = ptr[cnt];
+ ptr[cnt] = '\0';
+ KLOG_INFO("", "%s", ptr);
+ ptr[cnt] = yoink;
+
+ len -= cnt;
+ ptr += cnt;
+ }
+
+ free(buf);
+
+out:
+ LOGI("\n");
+ LOGI("************* END LAST KMSG *************\n");
+ LOGI("\n");
+}
+
static int read_file(const char *path, char *buf, size_t sz)
{
int fd;
@@ -863,6 +914,10 @@
klog_init();
klog_set_level(CHARGER_KLOG_LEVEL);
+ dump_last_kmsg();
+
+ LOGI("--------------- STARTING CHARGER MODE ---------------\n");
+
gr_init();
gr_font_size(&char_width, &char_height);