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Subject[PATCH 2/3] ARM: tegra: Add SMMU enabler in AHB
Date
Add extern func, "tegra_ahb_enable_smmu()" to inform AHB that SMMU is
ready.

Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
---
arch/arm/mach-tegra/include/mach/tegra-ahb.h | 19 +++++++++++++++++++
arch/arm/mach-tegra/tegra-ahb.c | 19 +++++++++++++++++++
2 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-tegra/include/mach/tegra-ahb.h b/arch/arm/mach-tegra/include/mach/tegra-ahb.h
new file mode 100644
index 0000000..51a5800
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra-ahb.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2012, 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.
+ */
+
+#ifndef __MACH_TEGRA_AHB_H__
+#define __MACH_TEGRA_AHB_H__
+
+extern void tegra_ahb_enable_smmu(void);
+
+#endif /* __MACH_TEGRA_AHB_H__ */
diff --git a/arch/arm/mach-tegra/tegra-ahb.c b/arch/arm/mach-tegra/tegra-ahb.c
index 411b51f..40877fa 100644
--- a/arch/arm/mach-tegra/tegra-ahb.c
+++ b/arch/arm/mach-tegra/tegra-ahb.c
@@ -20,6 +20,7 @@
*/

#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/io.h>
#include <linux/syscore_ops.h>

@@ -74,6 +75,9 @@

#define AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID 0xf8

+#define AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_DONE 1
+#define AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_SHIFT 17
+
static inline unsigned long gizmo_readl(unsigned long offset)
{
return readl(IO_TO_VIRT(TEGRA_AHB_GIZMO_BASE + offset));
@@ -84,6 +88,21 @@ static inline void gizmo_writel(unsigned long value, unsigned long offset)
writel(value, IO_TO_VIRT(TEGRA_AHB_GIZMO_BASE + offset));
}

+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+
+void tegra_ahb_enable_smmu(void)
+{
+ unsigned long val;
+
+ val = gizmo_readl(AHB_ARBITRATION_XBAR_CTRL);
+ val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_DONE <<
+ AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_SHIFT;
+ gizmo_writel(val, AHB_ARBITRATION_XBAR_CTRL);
+}
+EXPORT_SYMBOL(tegra_ahb_enable_smmu);
+
+#endif
+
#ifdef CONFIG_PM

struct __ahb_gizmo {
--
1.7.5.4


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