ARM: tegra: Disable VPR

[karo-tx-uboot.git] / arch / arm / cpu / tegra-common / vpr.c

diff --git a/arch/arm/cpu/tegra-common/vpr.c b/arch/arm/cpu/tegra-common/vpr.c
new file mode 100644 (file)
index 0000000..f695811
--- /dev/null
+++ b/arch/arm/cpu/tegra-common/vpr.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Tegra vpr routines */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch/mc.h>
+
+/* Configures VPR.  Right now, all we do is turn it off. */
+void config_vpr(void)
+{
+       struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
+
+       /* Turn VPR off */
+       writel(0, &mc->mc_video_protect_size_mb);
+       writel(TEGRA_MC_VIDEO_PROTECT_REG_WRITE_ACCESS_DISABLED,
+              &mc->mc_video_protect_reg_ctrl);
+       /* read back to ensure the write went through */
+       readl(&mc->mc_video_protect_reg_ctrl);
+}