From patchwork Mon Jun 30 07:54:22 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Edworthy X-Patchwork-Id: 4446171 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BAF5DBEEAA for ; Mon, 30 Jun 2014 07:54:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E52FE20373 for ; Mon, 30 Jun 2014 07:54:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F0A392035D for ; Mon, 30 Jun 2014 07:54:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754352AbaF3Hyp (ORCPT ); Mon, 30 Jun 2014 03:54:45 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:27441 "EHLO relmlie1.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752680AbaF3Hyo (ORCPT ); Mon, 30 Jun 2014 03:54:44 -0400 Received: from unknown (HELO relmlir1.idc.renesas.com) ([10.200.68.151]) by relmlie1.idc.renesas.com with ESMTP; 30 Jun 2014 16:54:43 +0900 Received: from relmlac4.idc.renesas.com (relmlac4.idc.renesas.com [10.200.69.24]) by relmlir1.idc.renesas.com (Postfix) with ESMTP id 07A7B4D1E8; Mon, 30 Jun 2014 16:54:44 +0900 (JST) Received: by relmlac4.idc.renesas.com (Postfix, from userid 0) id DF370480A7; Mon, 30 Jun 2014 16:54:43 +0900 (JST) Received: from relmlac4.idc.renesas.com (localhost [127.0.0.1]) by relmlac4.idc.renesas.com (Postfix) with ESMTP id DA6EF480A6; Mon, 30 Jun 2014 16:54:43 +0900 (JST) Received: from relmlii1.idc.renesas.com [10.200.68.65] by relmlac4.idc.renesas.com with ESMTP id SAC01809; Mon, 30 Jun 2014 16:54:43 +0900 X-IronPort-AV: E=Sophos;i="5.01,573,1399993200"; d="scan'208";a="163338087" Received: from unknown (HELO relay41.aps.necel.com) ([10.29.19.9]) by relmlii1.idc.renesas.com with ESMTP; 30 Jun 2014 16:54:43 +0900 Received: from DU0NOTES13.ad.ree.renesas.com ([172.29.24.131]) by relay41.aps.necel.com (8.14.4+Sun/8.14.4) with ESMTP id s5U7sd80006193; Mon, 30 Jun 2014 16:54:39 +0900 (JST) Received: from duacsls.ad.ree.renesas.com ([172.29.43.47]) by DU0NOTES13.ad.ree.renesas.com (Lotus Domino Release 8.5.3 HF466) with ESMTP id 2014063009543848-274390 ; Mon, 30 Jun 2014 09:54:38 +0200 From: Phil Edworthy To: linux-pci@vger.kernel.org Cc: linux-sh@vger.kernel.org, Bjorn Helgaas , Simon Horman , Sergei Shtylyov , Phil Edworthy X-Mailer: git-send-email 2.0.0 In-Reply-To: <1404114864-17330-1-git-send-email-phil.edworthy@renesas.com> References: <1404114864-17330-1-git-send-email-phil.edworthy@renesas.com> X-TNEFEvaluated: 1 Message-ID: <1404114864-17330-2-git-send-email-phil.edworthy@renesas.com> Date: Mon, 30 Jun 2014 08:54:22 +0100 Subject: [PATCH v2 1/3] PCI: host: pcie-rcar: Use correct initial HW settings X-MIMETrack: Itemize by SMTP Server on DU0NOTES13/SERVER/REE(Release 8.5.3 HF466|March 09, 2012) at 30.06.2014 09:54:38, Serialize by Router on DU0NOTES13/SERVER/REE(Release 8.5.3 HF466|March 09, 2012) at 30.06.2014 09:54:39, Serialize complete at 30.06.2014 09:54:39 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Although the R-Car PCIe driver works as it is, there are a number of incorrect settings that this patch corrects. It corrects: - enabling the PCI Express Extended Cap ID. - setting Data Link Layer Link Active Reporting Capable. - terminating list of capabilities. It also removes enabling the MAC data scrambling as this is the default HW setting, and removes incorrect code to enable slave bus mastering as this is done by the PCI core. Signed-off-by: Phil Edworthy --- v2: - No change drivers/pci/host/pcie-rcar.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index c06b888..680a8cc 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -483,14 +483,15 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie) rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); /* Initialize default capabilities. */ - rcar_rmw32(pcie, REXPCAP(0), 0, PCI_CAP_ID_EXP); + rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS), PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f, PCI_HEADER_TYPE_BRIDGE); /* Enable data link layer active state reporting */ - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), 0, PCI_EXP_LNKCAP_DLLLARC); + rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, + PCI_EXP_LNKCAP_DLLLARC); /* Write out the physical slot number = 0 */ rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); @@ -499,10 +500,7 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie) rcar_rmw32(pcie, TLCTLR+1, 0x3f, 50); /* Terminate list of capabilities (Next Capability Offset=0) */ - rcar_rmw32(pcie, RVCCAP(0), 0xfff0, 0); - - /* Enable MAC data scrambling. */ - rcar_rmw32(pcie, MACCTLR, SCRAMBLE_DISABLE, 0); + rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0); /* Enable MSI */ if (IS_ENABLED(CONFIG_PCI_MSI)) @@ -519,11 +517,6 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie) /* Enable INTx interrupts */ rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8); - /* Enable slave Bus Mastering */ - rcar_rmw32(pcie, RCONF(PCI_STATUS), PCI_STATUS_DEVSEL_MASK, - PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | - PCI_STATUS_CAP_LIST | PCI_STATUS_DEVSEL_FAST); - wmb(); return 0;