Update from 2013.01 to 2013.07

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / exynos / lowlevel_init.c

diff --git a/arch/arm/cpu/armv7/exynos/lowlevel_init.c b/arch/arm/cpu/armv7/exynos/lowlevel_init.c
new file mode 100644 (file)
index 0000000..11fe5b8
--- /dev/null
+++ b/arch/arm/cpu/armv7/exynos/lowlevel_init.c
@@ -0,0 +1,73 @@
+/*
+ * Lowlevel setup for EXYNOS5 based board
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Rajeshwari Shinde <rajeshwari.s@samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/dmc.h>
+#include <asm/arch/power.h>
+#include <asm/arch/tzpc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include "common_setup.h"
+
+/* These are the things we can do during low-level init */
+enum {
+       DO_WAKEUP       = 1 << 0,
+       DO_CLOCKS       = 1 << 1,
+       DO_MEM_RESET    = 1 << 2,
+       DO_UART         = 1 << 3,
+};
+
+int do_lowlevel_init(void)
+{
+       uint32_t reset_status;
+       int actions = 0;
+
+       arch_cpu_init();
+
+       reset_status = get_reset_status();
+
+       switch (reset_status) {
+       case S5P_CHECK_SLEEP:
+               actions = DO_CLOCKS | DO_WAKEUP;
+               break;
+       case S5P_CHECK_DIDLE:
+       case S5P_CHECK_LPA:
+               actions = DO_WAKEUP;
+               break;
+       default:
+               /* This is a normal boot (not a wake from sleep) */
+               actions = DO_CLOCKS | DO_MEM_RESET;
+       }
+
+       if (actions & DO_CLOCKS) {
+               system_clock_init();
+               mem_ctrl_init(actions & DO_MEM_RESET);
+               tzpc_init();
+       }
+
+       return actions & DO_WAKEUP;
+}