From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753592Ab2DXMFl (ORCPT ); Tue, 24 Apr 2012 08:05:41 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:17168 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753325Ab2DXMFi (ORCPT ); Tue, 24 Apr 2012 08:05:38 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Tue, 24 Apr 2012 05:05:37 -0700 From: Hiroshi DOYU To: hdoyu@nvidia.com Cc: linux-tegra@vger.kernel.org, Felipe Balbi , Colin Cross , Olof Johansson , Stephen Warren , Russell King , Tony Lindgren , H Hartley Sweeten , Jamie Iles , Rob Herring , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/3] ARM: tegra: Add SMMU enabler in AHB Date: Tue, 24 Apr 2012 15:05:15 +0300 Message-Id: <1335269116-9578-2-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1335269116-9578-1-git-send-email-hdoyu@nvidia.com> References: <1335269116-9578-1-git-send-email-hdoyu@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add extern func, "tegra_ahb_enable_smmu()" to inform AHB that SMMU is ready. Signed-off-by: Hiroshi DOYU Cc: Felipe Balbi --- arch/arm/mach-tegra/include/mach/tegra-ahb.h | 19 +++++++++++++++++++ arch/arm/mach-tegra/tegra-ahb.c | 18 ++++++++++++++++++ 2 files changed, 37 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 71b5950..32794ef 100644 --- a/arch/arm/mach-tegra/tegra-ahb.c +++ b/arch/arm/mach-tegra/tegra-ahb.c @@ -78,6 +78,9 @@ #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 + struct __tegra_ahb { void __iomem *regs; struct device *dev; @@ -95,6 +98,21 @@ static inline void gizmo_writel(unsigned long value, unsigned long offset) writel(value, tegra_ahb->regs + 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 + struct __ahb_gizmo { unsigned long offset; unsigned long data; -- 1.7.5.4