platform: msm_shared: Implement watch dog driver in LK.
Enable wdog at the end of LK to catch early kernel crashes
Change-Id: Ica4077a2cec28f6ee83f7fcdbe04001681b635d9
diff --git a/platform/msm_shared/include/wdog.h b/platform/msm_shared/include/wdog.h
new file mode 100644
index 0000000..ba3f359
--- /dev/null
+++ b/platform/msm_shared/include/wdog.h
@@ -0,0 +1,35 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation, nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __WDOG_H
+#define __WDOG_H
+
+void msm_wdog_init();
+
+#endif
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index dd024f8..d19df24 100644
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -18,6 +18,11 @@
$(LOCAL_DIR)/qgic_common.o \
$(LOCAL_DIR)/crc32.o
+ifeq ($(ENABLE_WDOG_SUPPORT),1)
+OBJS += \
+ $(LOCAL_DIR)/wdog.o
+endif
+
ifeq ($(ENABLE_QGIC3), 1)
OBJS += $(LOCAL_DIR)/qgic_v3.o
endif
diff --git a/platform/msm_shared/wdog.c b/platform/msm_shared/wdog.c
new file mode 100644
index 0000000..93a7309
--- /dev/null
+++ b/platform/msm_shared/wdog.c
@@ -0,0 +1,55 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <debug.h>
+#include <platform.h>
+#include <platform/iomap.h>
+#include <reg.h>
+#include <wdog.h>
+#include <target.h>
+
+void msm_wdog_init()
+{
+ uint32_t rc;
+
+ /* Set Bite and Bark times 10s */
+ writel(0x77FD3, APPS_WDOG_BARK_VAL_REG);
+ writel(0x77FD3, APPS_WDOG_BITE_VAL_REG);
+
+ /* Reset WDOG */
+ writel(1, APPS_WDOG_RESET_REG);
+
+ /* Enable WDOG */
+ writel((readl(APPS_WDOG_CTL_REG) | 0x1), APPS_WDOG_CTL_REG);
+
+ /* Set dload mode */
+ rc = set_download_mode(NORMAL_DLOAD);
+ if(rc)
+ dprintf(CRITICAL, "set_download_mode failed\n");
+}