Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757187Ab2ECQGX (ORCPT ); Thu, 3 May 2012 12:06:23 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:3147 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754081Ab2ECQGT (ORCPT ); Thu, 3 May 2012 12:06:19 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 03 May 2012 09:06:19 -0700 From: Hiroshi DOYU To: hdoyu@nvidia.com Cc: linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Felipe Balbi , Colin Cross , Olof Johansson , Stephen Warren , Russell King , Tony Lindgren , H Hartley Sweeten , Jamie Iles , Rob Herring , linux-kernel@vger.kernel.org Subject: [PATCHv3 2/4] ARM: tegra: Add SMMU enabler in AHB Date: Thu, 3 May 2012 19:05:43 +0300 Message-Id: <1336061147-10245-2-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1336061147-10245-1-git-send-email-hdoyu@nvidia.com> References: <1336061147-10245-1-git-send-email-hdoyu@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2919 Lines: 93 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 +++++++++++++++ drivers/amba/tegra-ahb.c | 32 ++++++++++++++++++++++++++ 2 files changed, 51 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..e0f8c84 --- /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 int tegra_ahb_enable_smmu(struct device_node *ahb); + +#endif /* __MACH_TEGRA_AHB_H__ */ diff --git a/drivers/amba/tegra-ahb.c b/drivers/amba/tegra-ahb.c index 03933f3..ec4e22f 100644 --- a/drivers/amba/tegra-ahb.c +++ b/drivers/amba/tegra-ahb.c @@ -76,6 +76,10 @@ #define AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID 0xf8 +#define AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE BIT(17) + +static struct platform_driver tegra_ahb_driver; + static u32 tegra_ahb_gizmo[] = { AHB_ARBITRATION_DISABLE, AHB_ARBITRATION_PRIORITY_CTRL, @@ -124,6 +128,34 @@ static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset) writel(value, ahb->regs + offset); } +#ifdef CONFIG_ARCH_TEGRA_3x_SOC +static int tegra_ahb_match_by_smmu(struct device *dev, void *data) +{ + struct tegra_ahb *ahb = dev_get_drvdata(dev); + struct device_node *dn = data; + + return (ahb->dev->of_node == dn) ? 1 : 0; +} + +int tegra_ahb_enable_smmu(struct device_node *dn) +{ + struct device *dev; + u32 val; + struct tegra_ahb *ahb; + + dev = driver_find_device(&tegra_ahb_driver.driver, NULL, dn, + tegra_ahb_match_by_smmu); + if (!dev) + return -EPROBE_DEFER; + ahb = dev_get_drvdata(dev); + val = gizmo_readl(ahb, AHB_ARBITRATION_XBAR_CTRL); + val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE; + gizmo_writel(ahb, val, AHB_ARBITRATION_XBAR_CTRL); + return 0; +} +EXPORT_SYMBOL(tegra_ahb_enable_smmu); +#endif + static int tegra_ahb_suspend(struct device *dev) { int i; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/