From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE4D8C433F5 for ; Tue, 25 Jan 2022 00:18:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2374504AbiAYARM (ORCPT ); Mon, 24 Jan 2022 19:17:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1850665AbiAXXag (ORCPT ); Mon, 24 Jan 2022 18:30:36 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 631B8C0AD1A2; Mon, 24 Jan 2022 13:34:54 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2AF5DB811FB; Mon, 24 Jan 2022 21:34:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A893C340E4; Mon, 24 Jan 2022 21:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643060091; bh=zBueeHikAA85moR0e9cXIh0B9MY89d969ZB1EM1xt0g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UFNAlSrXw5S74frSy/RhfRMDZjt1hpAK4SOpUhk+4Xqo/X+JZAlYC+vCmVTPeS4Iv iBB9Yrxj6VuVCcqbc6S7TRCS60lfsvx0qgHMoVEQK+43d1gXsWVNr/2PNhvnxLajew 8of75bl4NPONe4I0RlHDQYXjDkQ3jZV6sjQrB1hU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= , Lorenzo Pieralisi , Sasha Levin Subject: [PATCH 5.16 0803/1039] PCI: mvebu: Setup PCIe controller to Root Complex mode Date: Mon, 24 Jan 2022 19:43:12 +0100 Message-Id: <20220124184152.298163867@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pali Rohár [ Upstream commit df08ac016124bd88b8598ac0599d7b89c0642774 ] This driver operates only in Root Complex mode, so ensure that hardware is properly configured in Root Complex mode. Link: https://lore.kernel.org/r/20211125124605.25915-10-pali@kernel.org Signed-off-by: Pali Rohár Signed-off-by: Lorenzo Pieralisi Signed-off-by: Sasha Levin --- drivers/pci/controller/pci-mvebu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index abed58db56877..f279471e340ee 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -55,6 +55,7 @@ #define PCIE_MASK_ENABLE_INTS 0x0f000000 #define PCIE_CTRL_OFF 0x1a00 #define PCIE_CTRL_X1_MODE 0x0001 +#define PCIE_CTRL_RC_MODE BIT(1) #define PCIE_STAT_OFF 0x1a04 #define PCIE_STAT_BUS 0xff00 #define PCIE_STAT_DEV 0x1f0000 @@ -218,7 +219,12 @@ static void mvebu_pcie_setup_wins(struct mvebu_pcie_port *port) static void mvebu_pcie_setup_hw(struct mvebu_pcie_port *port) { - u32 cmd, mask; + u32 ctrl, cmd, mask; + + /* Setup PCIe controller to Root Complex mode. */ + ctrl = mvebu_readl(port, PCIE_CTRL_OFF); + ctrl |= PCIE_CTRL_RC_MODE; + mvebu_writel(port, ctrl, PCIE_CTRL_OFF); /* Disable Root Bridge I/O space, memory space and bus mastering. */ cmd = mvebu_readl(port, PCIE_CMD_OFF); -- 2.34.1